Merge pull request #100 from eile/master

Fix passing list variables to project cmake run
Merge pull request #101 from eile/master

Implement global option BUILDYARD_FORCE_BUILD
Merge pull request #103 from eile/master

Fix #102
Add share/proj/CMake to CMAKE_MODULE_PATH in FindPackages to facilitate shipping of auxiliary CMake scripts, fix some CMake 3.0 warnings