Changes in 1.14:
 * Added interactive tutorial
 * Points in graphs can be colored depending on another dataset and
   the scale shown in a colorbar widget
 * Improved CSV import
    - better data type detection
    - locale-specific numeric and date formats
    - single/multiple/none header modes
    - option to skip lines at top of file
    - better handling of missing values
 * Data can be imported from clipboard
 * Substantially reduced size of output SVG files
 * In standard data import, descriptor can be left blank to generate
   dataset names colX
 * Axis plotting range can be interactively manipulated
 * If axis is in date-time format, show and allow the min and max
   values to be in date-time format
 * ImageFile widget can have image data embedded in document file
 * Fit widget can update the fit parameters and fit quality to a
   label widget
 * Allow editing of 2D datasets in data edit dialog
 * Add copy and paste dataset command to dataset browser context menu

Minor and API changes:
 * Examples added to help menu
 * Picker shows date values as dates
 * Allow descriptor statement in standard data files after a comment
   character, e.g. "#descriptor x y"
 * Added some further color maps
 * Draw key symbols for vector field widget
 * Import plugin changes
    - Register classes rather than instances (backward compatibility
      is retained)
    - Plugins can return constants and functions (see Constant and
      Function types)
    - Add DatasetDateTime for returning date-time datasets
 * Custom definitions
    - Add RemoveCustom API to remove custom definitions
    - AddCustom API can specify order where custom definition is added
 * C++ code to speed up plotting points of different sizes / colors
 * Expand files by default in data navigator window
 * Select created datasets in data edit dialog
 * Tooltip wrapping used in data navigator window
 * Grid lines are dropped if they overlap with edge of graph

Bug fixes
 * Fix initial extension in export dialog
 * Fix crash on hiding pages
 * Fixed validation for numeric values
 * Position of grid lines in perpendicular direction for non default
   positions
 * Catch errors in example import plugin
 * Fix crash for non existent key symbols
 * Fix crash when mismatch of dataset sizes when combining 1D datasets
   to make 2D dataset

Changes in 1.13:
 * Graphs are rendered in separate threads for speed and a responsive
   user interface
 * A changed Graph is rendered immediately on document modification,
   improving latency
 * A new ternary plot widget is included
 * Size of pages can be modified individually in a document
 * Binary data import added
 * NPY/NPZ numpy data import added
 * Axis and tick labels on axes can be rotated at 45 deg intervals
 * Labels can be plotted next to points on non-orthogonal plots
 * Add an option for DPI of output EPS and PDF files

Minor improvements:
 * Import dialog detects filename extension to show correct tab
 * Polygon fill mode for non orthogonal plotting
 * --plugin command line option added, for loading and testing plugins
 * Plugin for swapping two colors in a plot
 * Dataset navigator is moved to right of window by default
 * Mac OS X binary release updated to Python 2.7.2
 * Import plugins can say which file extensions they support
 * Import plugins can be "promoted" to their own tab on the import dialog
 * ForceUpdate command added to embedding API, to force an update of
   the displayed plot (useful if SetUpdateInterval is set to 0)
 * X or Y dataset can be left blank in plotter to plot by row number

Bugs fixed:
 * Images plotted when axes are inverted are inverted too
 * Fixed crash when selecting datasets for plotting in the popup menu
 * Picker crashes with a constant function
 * 2D dataset creation using expressions fixed
 * CSV reader treated dataset names ending in + or - incorrectly
 * unique1d function no longer available in numpy

Changes in 1.12:
 * Multiple widgets can now be selected for editing properties
 * Add Edit->Select menu and context menu for above
 * Added context menu on dataset browser for filenames to reload,
   delete or unlink all associated datasets
 * New tree-like dataset browsing widget is shown in data edit dialog
 * Importing 1D fits images is now supported
 * Date / time data has its own dataset type
 * The data edit dialog box can create or edit date/time data in
   human-readable form

Minor improvements:
 * Add LaTeX commands \cdot, \nabla, \overline plus some arrows
 * Inform user in exception dialog if a new version is available
 * Add linevertbar and linehorzbar error bar styles

Bug fixes:
 * Fix crash on filling filled error regions if no error bars
 * Remove grouping separator to numbers in locale as it creates
   ambiguous lists of numbers
 * Undo works properly for boolean and integer settings
 * Prevent widgets getting the same names when dragging and dropping
 * Hidden plot widgets are ignored when calculating axis ranges
 * Combo boxes are now case sensitive when displaying matches with
   previous text
 * Fix errors if plotting DatasetRange or Dataset1DPlugin datasets
   against data with nan values
 * Fix division by zero in dataset preview
 * Do not leave settings pointing to deleted widgets after an undo
 * Fix errors when using super/subscripts of super/subscripts
 * Fix crash when giving positions of bar plot and labels
 * Do not allow dataset names to be invalid after remaining
 * Several EMF format bug fixes, including not showing hidden lines
   and not connecting points making curves
 * Stop crash when contouring zero-sized datasets

Changes in 1.11:
 * New data point picker for finding coordinates of points on plot
   (contributed by B.K. Stuhl)
 * New data navigator window for filtering, sorting and examining
   dataset statistics
 * ".." button next to dataset settings pops up data navigator for
   choosing datasets
 * Data fitting can now use PyMinuit, giving error estimates
   (B.K. Stuhl)
 * Console history now uses currently entered characters to select
   lines from history (B.K. Stuhl)
 * New self test script, comparing graph output with expected output
 * Put superscripts and subscripts above each other when
   formatting (B.K. Stuhl)
 * Key entries can have multiple lines (using \\) (B.K. Stuhl)
 * Option to treat blanks as data items in CSV files
 * Locale support added for number formatting
    - Can use current locale or US/English in documents
    - Can use US/English or current local in user interface
 * Contours avoid missing (nan) values

 * Linux binaries are now created on a more modern system
 * Windows binaries now use MSVC for compilation

Bug fixes:
 * CSV import with blank columns fixed
 * Embedding module now working when using binary
 * Remember current directory with unicode characters
 * Extension module now compiles under MSVC in Windows
 * Output is always appended to console (B.K. Stuhl)
 * \r characters sometimes break data import in Windows
 * If using --export option, add directory of script to import path

Minor bug fixes:
 * Zero sized dataset contour plot fix
 * Fix problem on context menu for axis match setting
 * Small values on log axis fix
 * Disable data edit dialog context menu when no datasets
 * Loading files with unicode filenames on command line
 * Do not allow non finite float settings