allow openscad binary to be compiled with or without QT. use non-QT for tests.
restore missing digits. make --info work better. fix parser / path bug
moving towards making tests work on bsd again
make echotest work on BSD, by adding .echo as recognized extension
use debug symbols for test binaries. also remove echostream pointer
dumptest should be fine now on BSD, using openscad binary
enable clang for freebsd (tested on freebsd 9)
tweaks for building on older machines
Merge branch 'issue480' of github.com:openscad/openscad into issue480

Conflicts:
	tests/CMakeLists.txt
turn off extra debug in cmakelist