Beta-testing of CityBus

Alpha-testing didn't reveal any serious problems in CityBus app. 

During closed testing few changes were added, most important of which are:

- option to show few route paths at once
- database update in Preferences
- added "Menu" button specially for those, who don't already know, that menu in Android is opened by swipe from left side of screen ;)
- speed and heading visualization on markers

Last revision of alpha-version almost without changes was moved to stage beta, testing is available to everyone!