GLM 0.9.9.1

Features:

• Added bitfieldDeinterleave to GTC_bitfield
• Added missing equal and notEqual with epsilon for quaternion types to GTC_quaternion
• Added EXT_matrix_relational: equal and notEqual with epsilon for matrix types
• Added missing aligned matrix types to GTC_type_aligned
• Added C++17 detection
• Added Visual C++ language standard version detection
• Added PDF manual build from markdown

Improvements:

• Added a section to the manual for contributing to GLM
• Refactor manual, lists all configuration defines
• Added missing vec1 based constructors
• Redesigned constexpr support which excludes both SIMD and constexpr #783
• Added detection of Visual C++ 2017 toolsets
• Added identity functions #765
• Splitted headers into EXT extensions to improve compilation time #670
• Added separated performance tests
• Clarified refract valid range of the indices of refraction, between -1 and 1 inclusively #806

Fixes:

• Fixed SIMD detection on Clang and GCC
• Fixed build problems due to printf and std::clock_t #778
• Fixed int mod
• Anonymous unions require C++ language extensions
• Fixed ortho #790
• Fixed Visual C++ 2013 warnings in vector relational code #782
• Fixed ICC build errors with constexpr #704
• Fixed defaulted operator= and constructors #791
• Fixed invalid conversion from int scalar with vec4 constructor when using SSE instruction
• Fixed infinite loop in random functions when using negative radius values using an assert #739