Merge pull request #9 from bilgili/master

Merge subproject support
Bump CMake subtree
Fix travis
Fix clang build
Merge pull request #10 from tribal-tec/master

Fix clang build
Fix VS2012 build
Merge pull request #11 from tribal-tec/master

Fix VS2012 build
Fix vector unit test
Merge pull request #12 from eile/master

Fix vector unit test
Fix CI builds
Merge branch 'master' of https://github.com/Eyescale/vmmlib