Add cmake error output in case dependencies for core library are missing
Give status message in case core library cannot be built.
Get version macro right
Merge pull request #94 from flavioberetti/master

Finish porting to Arch and Gentoo
Fix build with gcc 4.4
Merge pull request #95 from eile/master

Fix build with gcc 4.4
Merge branch 'master' of https://github.com/eile/DisplayCluster

Conflicts:
	src/core/CMakeLists.txt
Merge branch 'master' of https://github.com/BlueBrain/DisplayCluster