Minor cosmetic enhancements.
commint forgoten files in boost lib.

soldermask. Nevertheless, it would be nice to have proper gerbers to
begin with, i.e., gerbers with no silkscreen in soldermaskless areas.
Of course, most of the problem can be taken care of by drawing the
footprints properly. However, sometimes the silkscreen of one
footprint ends up on the pads of another one (think components under a
so-dimm card, for example). The attached patch adds an option to
subtract the soldermask from the silkscreen when doing gerber output.

marco

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.

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

STRING_LINE_READER::ReadLine() has been broken for a few weeks, since changing the purpose of member 'source'

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