Revert "Merge branch 'master' of https://github.com/ValeraProj/Valera3D"

This reverts commit 1d03b7da72bbbf450ed8ead1fe182b225d2ae2c0, reversing
changes made to a35fddf2d1d1f4d6548ddd860623535b94436f33.
* Use c++11 in unix compilers

* Use cmake min ver 2.8.9
* Revert
Merge branch 'master' of https://github.com/ValeraProj/Valera3D

Conflicts:
	CMakeLists.txt
	tests/CreateWindow/CMakeLists.txt