Try the CGAL EPEC kernel for 3D operations
manually merging Logxen's amf exporter - initial steps
Merge branch 'master' of github.com:openscad/openscad into logxen_amf_export
create point struct, further work
re-integrate LogXen's AMF code, with modifications
alpha level - export CGAL volumes as AMF volumes. still buggy
Merge branch 'master' into epec-kernel
Merge branch 'master' of github.com:openscad/openscad into logxen_amf_export

Conflicts:
	src/export.cc
printf->PRINT
Bumped mpfr to 3.1.2
Updated dependencies
Merge branch 'master' into epec-kernel

Conflicts:
	src/PolySetCGALEvaluator.cc
I think this should fix issue #217
Merge branch 'master' into issue217
Added test for inner module variables
diagram update
Refactored context handling into using separate Module contexts and Eval contexts. This allows for recursive module calls, and cascading children. I believe this fixes issue #116
Added latest fixes
Disable  context debug output
Print warnings on child index out of bounds