Add first bindless texture example
resolve sqrt (use std)
Improve bindless texture example
Merge pull request #172 from hpicgs/bindless_texture_example

Bindless texture example
Update README.md
Update README.md
Add VertexDrawable convenience class
Add uniform buffer support (ref #174, #23)
Return UniformBlocks as pointer
Add move constructor to ref_ptr
Merge remote-tracking branch 'origin/master' into uniform_buffers
Revise UniformBlock interface
Add getActiveUniforms with int indices as convenience
Refactor UniformBlock
Fix compile error on Windows: error C2491: 'glowutils::Format' : definition of dllimport function not allowed
Fix compile warning on Windows: C4273: 'glow::getIntegers' : inconsistent dll linkage
Improve VertexDrawable interface
Add convenience methods flro FrameBufferObject::blit
Fix visual c++ compile error: Missing include <array>
Add convenience readPixels methods and wrap glGetTexImage