Pcbnew: For zone filling algo, change the default polygon library from Kbool to Boost::polygon (USE_BOOST_POLYGON_LIBRARY default is ON). (need to rebuild makefile)
Gerbview: added decimal format for coordinates, sometimes found in Gerber files.

Gerbview:  Added support for complex definitions of parameters (like $3=$2+5/2)  in aperture macros and primitives macro.

minor cleanup. minor enhancements. Finish file housekeeping. add Bug 682586 fix from Mark van Doesburg.

can be deleted later if they exist in the headers, or moved to 
headers if they should exist in the headers.

Gerbview: remove useless calls to SetToolbar() which create horizontal toolbar flicker under Windows.

Gerbview: fix an issue with gerber files having a line comment starting by G04 and a command after this comment, on the same line.

Gerbview: support for plot lines (currently: not arcs) with a rectangular pen (Yes, it exists!). pcbnew: try to fix an issue when exporting arcs in gencad.

Gerbview: Fixed compil problem in debug Mode. Pcbnew: try to fix an issue in export gencad  (incorrect rectangular pads)

Gerbview: Added support for gerber command   SR (Step and Repeat) and multiple MOIN and MOMM in file

Gerbview: added  support forSF  (scale factor), IO (Image Offset), OF (Offset) and MI (Mirror) commands.

Fixed a bug about Aperture Definition having parameters for an aperture macro. See Changlog for not yet supported RX274X commands. Having still problems with arcs in some gereber files.