Version 0.2 - UNRELEASED
 * added an alternative GTK interface with additional features:
  * configurable 3D view settings: model / toolpath / axis / drill progress / frame skip
  * manipulation of the model: rotation, flip, swap, scale, move
  * saving the model to an ascii STL file
  * load/save processing settings from/to a file
  * handling of multiple processing templates (e.g. "Rough", "Semi-finish" and "Finish")
  * configure "material allowance" for a minimum distance between drill and model
  * configure the "safety height" for the machine
  * allow to manage and export (gcode) multiple toolpaths
  * based on GtkGlExt (for OpenGL)
  * visualize conflicting processing settings
  * configure "overlap" instead of "lines" and "samples"
  * configure "maximum step down" instead of "layers"
  * show a progress bar during calculations
 * improved performance by (optionally) using the "Open Dynamics Engine" (ODE) for
   collision detection
 * added basic lightning to the OpenGL view

Version 0.1.11 - 2010-02-19
 * fix detection of binary STL
 * added Simulation mode
 * ignore invalid triangles (caused by high-resolotion models)
 * automatic boundary fits to the model
 * add ubuntu specific note
 * code cleanups

Version 0.1.10 - 2009-07-13
 * support binary STL
 * close contours

Version 0.1.9 - 2009-06-18
 * linux compatibility
 * integrated kdtree
 * fix speedup shortcuts

Version 0.1.8 - 2009-04-14
 * some feature requests
 * fixes by Dan Falck
 * fix bug in torus-point intersection
 * specify model in cfg
 * fixed opengl representation
 * update tests

Version 0.1.7b - 2009-02-10
 * fix glutInit bug

Version 0.1.7 - 2009-01-27
 * another try at fixing PushCutter
 * remove MGED exporter

Version 0.1.6b - 2009-01-15
 * fix save
 * follow api updates
 * fix gcode parameter strings

Version 0.1.6 - 2009-01-14
 * fix verticals intersection
 * add ContourCutter
 * guard against float division
 * add x/y direction
 * add ContourCutter
 * minor layout improvements
 * make speed configurable
 * enable command line driven operation
 * debug output
 * SVG output

Version 0.1.5 - 2008-11-26
 * add direction switch
 * add reading pre-model default values from config file
 * fix verticals in DropCutter

Version 0.1.4 - 2008-11-16
 * make tool come outside the stock while cutting
 * make safety height higher than stock

Version 0.1.3 - 2008-09-17
 * fix redraw

Version 0.1.2 - 2008-09-11
 * added unit option mm/in
 * fix coordinate system for Art of Illusion exported STL files
 * added view control buttons
 * added bounding box calculation

Version 0.1.1 - 2008-09-01
 * second release

Version 0.1 - 2008-08-29
 * initial release