Added friends page, reset all styles to AppTheme

Can someone good at graphic design take on the updating of
res/values/style.xml ? I'm assuming we want a cohesive feel, (idk who is
decing what that is though) so coders should use
android:theme="@style/AppTheme" whenever a theme reference is wanted.
Icons, button functionality

Design-wise, still need buttons over the map
Changes to display of friends
Merge branch 'master' of https://github.com/bhahm/PingU-Android