fixed: printf -> std::printf and missing include
fixed: commented unknown structure member (gcc4.8.2,f19,x86_64)
added: quat::op+=(quat) and quat::op*=(quat)
fixed: type (GLM_SWIZZL vs GLM_SWIZZLE)
added: op<< for glm types
Merge pull request #139 from regnirpsj/0.9.5

0.9.5: minor compile fixes, op+=/op*= for glm::quat, op<< for glm types