Back ported extended swizzle fix for issue #84
Fix broken _GLM_SWIZZLE4_4_MEMBERS
Added missing GLM_FUNC_DECL specifiers
Fix missing return statement in swizzle assignment operator
Add more missing GLM_FUNC_QUALIFIERs
Merge pull request #86 from tszirr/0.9.4

0.9.4: Lots of CUDA warnings & swizzle fixes
Fixed merge