Remove duplicate trips from stops.
Bumped version code for next release.

Change-Id: Iab049c91ecdb5198bf714692d133a2ad9ac67df2
Show version info in the About screen.

Change-Id: If08779b4a4dc6dec1316542965e07c0439b4ae1a
apk for version 1.7.1.

Change-Id: I49390da36f2ce5286e583e27d210f2e9feed9422