0.3.1
    - bugfixes
    - examples
    - pixmap buffering 
    - python module
0.3
    - formulas
    - cut/copy/paste,
    - undo/redo,
    - group/ungroup objects,
    - multiple pages,
    - arbitrary number of axes per graph,
    - surfaces and contours can display non-gridded data ( using Delunay triangulation ),
    - colored area under the surface, v-gradient, plotting 4d data ( still under development ),
    - XY plots - stairs,
    - custom tics values,
    - fast selecting of graph elements by middle button click,
    - general data storing policy has changed - vectors are stored as columns,
    - many bug fixes.
0.2.2
    - bugfixes: surfaces use row index, autorun from within Octave and Scilab,
      loads/saves arrow styles, no crashing when loading/saving or deleting objects, 
      Scilab functions updated.
    - exporting(requires) to Qt Metafile, PNG, JPEG, BMP, pdf(GhostScript), 
      eps(Ghostscript), xfig(pstoedit) and other formats provided by 
      GhostScript, pstoedit or ImageMagick.
    - global data sheets.
    - rulers added to the page view
    - 3d scatter and trajectory plots
0.2.1
    - compile problems (hopefully) fixed
    - new autoconf/automake scripts
    - smoother GUI
    - new gradient implementation. 
0.2
    - major redesign
    - QGL widget is distributed with KMatplot