This is basically skydb v2, except only for android.
I revisited some of the architecture decisions I made
in writing skydb. I also separated skyserver.py from
dependency on skypy/paths.py since it wasn't really adding
any value.
We could make this way fancier, but this should at least
make working with SkyDemo.apk easier for now.
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/960233007
