Unity 5.3.1p1 is out!

No VR-specific changes.

It seems to run fine overall, and fixed some console errors I'd been seeing in 5.3.1f1, but some other issues introduced in 5.3.1f1 are still present:

- LineRenderers are no longer drawn properly in VR. The position of the line is offset for each eye. This can be reproduced in the editor or on the device.

- Under specific circumstances, when I mouseover a scrollbar on my UI Canvas (which toggles a shadow effect), the canvas flickers in the right eye. It seems to be displaying incorrectly for one frame, but it's too fast for me to be sure whether it's blank or offset or what during that frame. There are no problems in the left eye. This only occurs on the device, not in the editor.

I was occasionally seeing a canvas drawn on top of particle effects that were in front of it in 5.3.1f1, but haven't been able to reproduce it yet in 5.3.1p1 so if I'm lucky it's already fixed.

Edit: Will from Unity:

The line renderer issue is known and will most likely come in the next patch release. However, I haven't seen the UI canvas bug, please submit a bug report with a small repro if possible and I can take a closer look.