Pycam

* GUI change: tool and process settings can be combined into tasks
* store configured settings to a file in the user's home directory
* added "material allowance" support for non-ODE calculations
* added export of LinuxCNC tool definitions
* added a warning dialog (GUI) for missing dependencies during startup (especially useful for Windows)
* improved GUI for model scaling
* allow to configure if the tool should move inside/along/around the boundary limits
* fixed "overlap" calculation
* prevent invalid input values (zero tool radius, ...)
* fixed a bug that could rarely cause eternal loops of the PushCutter
* reduced memory consumption of toolpaths for python 2.6 or above
* disabled ODE as the default computation backend (due to this bug:
http://sourceforge.net/tracker/?func=detail&aid=2973876&group_id=24884&atid=382799)

* added a graphical installer for Windows (via distutils)
* fixed broken commandline parameter "--template"
* added workaround for ODE collision detection, that is broken under specific circumstances
* fixed hang with PushCutter and ODE on Windows
* fixed "division by zero" error in non-ODE mode
* allow to disable ODE via commandline option
* bugs fixed in cylindrical and toroidal cutter when using dropcutter on horizontal triangles
* fixed "setup.py" for distutils packaging (contributed by Arthur Magill)

* fixed code that depended on GTK 2.16 (instead of 2.12)
* view settings "light", "shadow" and "polygon fill" are now configurable
* documented version problems with Debian "Lenny" and Ubuntu (before "Karmic")

* added an alternative GTK interface with additional features:
* configurable 3D view settings: model / toolpath / axis / drill progress / frame rate / colors
* 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 at once
* based on GtkGlExt (for OpenGL)
* visualize invalid processing setting combinations
* configure "overlap" instead of "lines" and "samples"
* configure "maximum step down" instead of "layers"
* show a progress bar during calculations
* basic lighting for the OpenGL view
* improved performance by (optionally) using the "Open Dynamics Engine" (ODE) for
collision detection

* 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

* fix minor release mistake (missing "STLExporter")