Updated dependency Semantic Git to 2.0.13, in order to fix build bug on Travis CI
Removed APT caching from .travis.yml file [skip ci]
Renamed solution file to mono-centric version
Merge branch 'dev' of https://github.com/reexjungle/xcal.git
Removed microsoft-specific test project from mono-centric solution
Updated .travis.yml to remote build only on mono-centric solution