Merge pull request #836 from Niektory/master

Fixed compile error
Merge pull request #837 from Niektory/master

Fixed CEGUI version detection
Removed C++11 code to fix compiler error on old compilers (MSVC 2008)
Merge pull request #838 from Niektory/master

Fixed minor glitches in Rio (occasional flickering gaps during movement)...
CEGUI demo ported to CEGUI 0.8.