2.13.1.0

• Added extensionSupported.
• Relaxed upper version bound for OpenGLRaw.
• Added CHANGELOG.md to distribution.

2.13.0.0

• Added missing drawing commands using vertex arrays and some related types.
• Added missing whole framebuffer operations.
• Added getters for stencilMaskSeparate, stencilFuncSeparate, and stencilOpSeparate, making them full-blown StateVars.
• Added patchDefaultInnerLevel and patchDefaultOuterLevel to control the default tessellation levels.
• Added ContextLost constructor to ErrorCategory type.
• Added SeparateAttribs and deprecated SeperateAttribs, fixing a spelling mistake.