Log Message:
Changes 1.6.0:
New extensions:
* GL_AMD_blend_minmax_factor
* GL_AMD_sample_positions
* GL_EXT_x11_sync_object
* GL_NV_texture_multisample
* GL_NV_video_capture
* GLX_NV_video_capture
* WGL_NV_DX_interop
* WGL_NV_video_capture
Bug fixes:
* Define GLEW_NO_GLU for no glu dependency.
* mx suffix for GLEW MX libraries, build both libraries by default.
* Cygwin build improvements
* Soname of GLEWmx shared libraries
* Query GL extension string only once
* GLX_OML_sync_control no longer requires C99
* glDraw*InstancedARB moved from GL_ARB_draw_instanced to
  GL_ARB_instanced_arrays
* glFramebufferTextureLayerEXT moved from GL_EXT_geometry_shader4 to
  GL_EXT_texture_array
* Fixes for BSD build