see extended description

- added several files with data (sizes: very small, small, medium,
large, very large);
- PartnerPointInfoPanel able to open GoogleMaps app to show route to the
current partner point;
- all activities with action bar;
- duplication avoided (PartnerPointsInfoPanelFragment and
PartnerPointsMapFragment combined into one activity - abstract base
activity: ActivityWithPartnerPointsMapFragmentAndInfoPanel which is base
class for MainScreen and SearchResultMapActivity classes.
- refactoring