Squashed 'VRAppSettingsExample/Requirements/VRFoundationToolkit/' changes from 1a1e4fa..be812d2

be812d2 VRPerformSelectorUnderProtocolIfPossible macro is corrected. Category changed to function to process any id objects.
d511838 VRASSERT is corrected to just throw assertion with description of failed instruction.
84a683b Added VRLOG_ERROR_ASSERT_RETURN_NIL to VRLog.h
9af4328 Update README.md

git-subtree-dir: VRAppSettingsExample/Requirements/VRFoundationToolkit
git-subtree-split: be812d2ca1247b59aa11aae5e1be1762aa26b86d
Merge commit '38e51fdc85e26f77144df1c43712e8a8b12c908a'