* Update to buildbot 0.9.11
* add buildbot-grid-view
* buildbot 0.9.11 works with Python 3, so remove restriction on Python 2.7 in USES
* clean up stuff from individual Makefiles that was copy/pasted from the main buildbot Makefile
* buildbot-www, buildbot-grid-view, buildbot-console-view, buildbot-waterfall-view cannot be tested outside
of buildbot, so remove stuff from their Makefiles to simplify.