Depend on external gfx_gl repository
Merge pull request #347 from bjz/gfx_gl

Depend on external gfx_gl repository
Implemented Ord for RefBatch
Merge pull request #348 from sectopod/ord

Implemented Ord for RefBatch
Added CommandBuffer export
Merge pull request #349 from sectopod/ord

Added CommandBuffer export
Add dependency diagram to README
Simplify diagram by leaving out the other dependencies for the examples
Use .dot file extension
Merge pull request #350 from bjz/diagram

Add dependency diagram to README
Add windowing libraries to dependency graph

Helps to demonstrate that gfx-rs is decoupled from a single windowing library.
Merge pull request #353 from bjz/diagram

Add windowing libraries to dependency graph
Update triangle example to clear every frame

  - Solves flickering under Windows due to clear only being called once
  - Consistent with other examples
Merge pull request #356 from AnthIste/examples

Update triangle example to clear every frame
Exported PrimitiveType
Merge pull request #357 from sectopod/prim

Exported PrimitiveType
Exporting shader stages
Merge pull request #358 from sectopod/prim

Exporting shader stages
Update to Rust master
Merge pull request #360 from cmr/fix-master

Update to Rust master