Add willis, a tool to show the status of your entire source tree.
Add willis, a tool to show the status of your entire source tree.

Willis was inspired by Bill's wtf script.

Change-Id: Ie58c51bfafe1041bf7e9d6509b2acb050ba55ac7

BUG=None
TEST=run willis, see that there are changes in my tree, be happy

Review URL: http://codereview.chromium.org/6409029

coreos/dev-util,mgireesh05/dev-util,marineam/coreos-dev-util,coreos/dev-util,mgireesh05/dev-util,mgireesh05/dev-util,coreos/dev-util,marineam/coreos-dev-util