Bugfix - png is the last arg + some better error output
Pass full path to python script
Merge remote-tracking branch 'origin/master' into issue350
Allow other files than .scad as input
Report boost version, don't add BOOST_FILESYSTEM_VERION for recent boost versions
Refactored the camera handling a bit, added --viewall cmd-line parameter
Merge remote-tracking branch 'origin/master' into issue350

Conflicts:
	src/CGALRenderer.cc
	src/export_png.cc
STL export test of lazy union functionality