EnableCXX11, abort if cannot find suitable C++11 compiler
Added glog and usage test
Added logging initializer
Update easylogging++
Added missing includes
Merge remote-tracking branch 'origin/develop' into feature/glog

Conflicts:
	libvis/CMakeLists.txt
	libvis/test/CMakeLists.txt
Using glog for logging
Removed Easylogging++
Merge branch 'feature/glog' into develop

Conflicts:
	easylogging++/easylogging++.h