Minor map improvements

[Glorf]

I'd be glad to see my location as compass-based device turn (the same way as it works in Google Maps), and small scale on the bottom.
Thanks in advance

P.S. I wanted to make pull request but app don't build to me due to some weird maven & linux & android bug

[zeyomir]

Definitely a good idea, the scale was planned either way (issue #26), but showing the direction user is facing should be helpful. I think all of these map improvements will be added as part of migrating to google maps api v2.

P.S. that's strange- it builds fine on my Jenkins CI server which runs on linux.