Try the CGAL EPEC kernel for 3D operations
Merge branch 'master' into epec-kernel
Merge branch 'master' into epec-kernel

Conflicts:
	src/PolySetCGALEvaluator.cc
Merge branch 'master' into epec-kernel
Ported recent changes to the EPEC kernel
Don't auto-reload missing files, reduce warning output from periodically called functions
typo
Changed compile GUI logic to properly handler automatic reload on cascading changes
Added testcase for cascading changes
Added automatic reload and compile note
Minor refactoring, no longer automatically reloads if a dependency disappears
Merge branch 'master' into issue181
bugfix: Auto-reload failed in some circumstances
Increase recursion limit to 1000
Related to #181, also ignore removal of the main file when auto-reloading
cascadetest.scad is now autogenerated
Merge branch 'master' into issue181
bugfix: dxf_cross() on file-not-found
Some expressions didn't support toString, which caused an assertion failure. Part of #384
Dump the else part of if-else blocks if it has any content. Part of #384