working on adding legends to the plots
 legends now have colors and a backing rectangle
Merge commit 'cd4506f6d601eec9a14f2b5ee2c41474802a06c2'
removed scatter selection overlay view scatter renderer renders selected points, as it should added box selection overlay , which renders the selected box
bugfixes from last commit, removing references to scatter selection overlay view in mpl.py and other tests
Merge commit 'a1dce9a242b76b774f82191bb9505f280243dc2d'

Conflicts:
	subtree/bokehjs/src/coffee/base.coffee
	subtree/bokehjs/src/coffee/bokeh_views.coffee
	subtree/bokehjs/static/coffee/tools.coffee
	subtree/bokehjs/test/unittest/plot_test.html
plot context default view broken from moving stuff around
another undefined reference
Merge commit '1a54af522b32c35ff4a12d365d46397357dca52f'
some files were not deleted during merge for some reason...{