loader: Clean up some things in the MD file

Clean up some documentation in the LoaderAndLayerInterface
markdown.  Over the next few weeks, I'll be working on
cleaning up the format and language of this doc.

Change-Id: I7858981293de9befb34701c31542d88c664cd6d8

Merge branch 'trunk'

doc: add deps to BUILDVT.md

doc: add deps to BUILDVT.md

layers: Move call to validateCommandBuffersNotInUse inside lock

Fixes segv in CTS multithreaded command pool test

Change-Id: I80da12fd2bb6856e3c6824f17dd92f1597121a54

docs: Sync README from master

windowsruntime: Tag for Windows Runtime 1.0.3.0 release.

s/LoaderAndTools/LoaderAndValidationLayers/g

linux: use linux naming conventions