Fix circle not theming

Change-Id: Ica0d917d736b852a9617fe5f645f8002c5dc4e11
Signed-off-by: Dan Trifan <jimsth@gmail.com>
HALO Style revamp

- speech bubbles are centered
- number batches are roundand simplified, same color as in g+
- markers appear as dots above the bubble
- hiding and dimissing triggers text hints
- couple of bugfixes

WARNING: some of the drawables are good for xhdpi only for now and must
be scaled down for the other resolutions

Change-Id: I54429d08229daef50a9fcf2efb415a92d0a44094
Signed-off-by: Dan Trifan <jimsth@gmail.com>