* Add explicit pass architecture to lightweight. It is possible to write a custom pass and a custom LW renderer and arrange these passes in a way that makes sense for your project.
* Remove Command buffer from setup API
* Pull surface data into their own passes for more explicit control.
* Splitting out existing LW passes to be more granular
* Add default LWRP renderer that can be used as a reference
* Add test for custom LW pipe.
* Split out RT handles to be part of the renderer configuration now.
* Remove Surface handling from LW Renderer and push to passes.
* Add template images for new test.
* Update changelog