Merging r6643 through r6657 from trunk to ogl-es branch
Fix comment typo
Unify CMatrix4 functions multiplyWith1x4Matrix and transformVec4
Avoid mixing char and wchar_t strings in examples
SpinBoxes can now be created without buttons
Opening/closing sub-menus now with delay controlled via IGUIEnvironment::setMenuShowDelay
IAttributes::getAttributeAs function with index now also take a default attribute
Refactoring: E_OPENGL_FIXED_PIPELINE_STATE -> E_OPENGL_ACTIVE_PIPELINE