Changed Level Thresholds to be more spaced out. Manifest Updated.

Alpha had 10 levels passed in under 500 points. The scaling for the
thresholds has been reworked to make the point difference between
levels larger.

A few minor changes the Android manifest file and now working on
version Alpha 1.1 as the next version.

Signed-off-by: Alex Colson <guythundar@gmail.com>