- Support different BINDIR, INCLUDEDIR and LIBDIR on install
- Take right python dir on x86_64 arch
- Fix build against Boost >= 1.58
- Make it possible to build libIfcGeom shared to reduce size of dependent binaries
- Fix INSTALL_RPATH
- Fix some more compiler warnings
CMake: added an entry at main CMake script that makes QTViewer an optional build.
QT Viewer main structure only, libQGLViewer or any 3D functionality can be added to mainWindow as a widget later on.