Add Changelog Dialog plus strings
Resource layout for Tube lines dialog preference items
Update tools and gradle versions
Rename styles
Update to use amended style names
Add missing tube line code, and change names array to use string resources
Add tube name strings and changelog dialog-related strings
Now use LimitedMultiSelectDialogPreference
Create new DialogPreference for selecting up to five tube lines
Add Changelog menu item
 1) Use SharedPreferencesChangeListener instead of Preferences one
 2) Add menu handling for Changelog menu option
Modify extension string generation