Cnc25d

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* GPL v3 is applied to this Python package.

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* Python package created with setuptools (instead of distribute)
* add API function smooth_outline_c_curve() approximates a curve defined by points and tangents with arcs.
* integrate circle into the format-B
* add API functions working at the *figure-level*: figure_simple_display(), figure_to_freecad_25d_part(), ..
* remove API function cnc_cut_outline_fc()
* gear_profile.py generates and simulates gear-profiles
* gearwheel.py

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* New API function outline_arc_line() converts an outline defined by points into an outline of four possible formats: Tkinter display, svgwrite, dxfwrite or FreeCAD Part.
* API function cnc_cut_outline() supports smoothing and enlarging line-line, line-arc and arc-arc corners.
* Additional API functions such as outline_rotate(), outline_reverse()
* All Cnc25D API function are gathered in the cnc25d_api module
* Box wood frame design example generates also BRep in addition to STL and DXF.
* Box wood frame design example support router_bit radius up to 4.9 mm with all others parameters at default.

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* Add the box_wood_frame design example

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* Experimenting distribute_

.. _distribute : http://pythonhosted.org/distribute

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* Initial release