Blender Git Loki

Rename internal VAMR files (mainly removes VAMR_ prefix)

Also rename VAMR_internal.h to utils.h and move OpenXR include out of
it.

Use VAMR namespace for internal types

Remove unnecessary WITH_OPENXR definition in BKE

Remove Ghost-XR code

Also fixes remaining call to it.

Call VAMR functions in window-manager, not GHOST_Xr

This gives linking errors currently because of conflicting symbols, but
that is to be expected and will be fixed in a followup.

Add missing C-API source file

Also add missing license header.

Rename types and functions for VAMR

Move Ghost-XR files into new VAMR-module and rename them

Merge branch 'master' into soc-2019-openxr

Merge branch 'master' into soc-2019-openxr

Don't drwa relationship lines in the VR view

Merge branch 'master' into soc-2019-openxr

Add Oculus to the list of known runtimes

With this, all currently available runtimes are in the runtime map. So
removing the TODO comment.

Cleanup: Refactor (hacky) swapchain image submission

Code now assumes that the view-draw callback left the OpenGL state for
ongoing use by Ghost-XR. So the state doesn't have to be set by the
swapchain image submission and thus it we don't need to pass the Ghost
OpenGL context to it in a hacky way.
Also, rename drawViewEnd (to submitToSwapchain) and remove
drawViewBegin.

Fix warning in release builds

Own FBO for VR viewport to get previous changes to work

Avoid OpenGL context deactivation, just to reactivate it immediately

Remove hack to resize the usable default framebuffer region

Remove blitting from default framebuffer

Add Monado to the list of known runtimes