add .gitreview to the project

Change-Id: Ib2b995eb1e3f355731db004151b688af742c602e
kill off swift on clean, as it doesn't live in screen

Change-Id: Ibd84f39a217a898bdc8405dd8203722cba07b7ed
we often loose this device, don't blow up if it's not there

Change-Id: I98721d29306f2d77b55c1706d3153c68f2f25593
purge the _RELEASE_DIR directories on clean.sh

if we don't do this we can't take in bug fixes to the grizzly
repo from upstream.

Change-Id: I9fab880560404ae47f42e546317ae2b1da27be04