Gradle files for android Studio 0.5.1+ (Gradle 0.9+)
Implement Android Beam (NFC Sharing) for cgeo

To support direct opening of CGEO on the other device, introduce a distinction between getBrowserURL and getCgeoURL in providers.
Implements #96, Change log / What's new popup on start

- Checks the last version from preferences with current
- Stores current version
- switches to about - changelog on version change
Don't let the OAuth dialogs use the Dialog theme

This fixes the crash when a OAuth dialog is shown, a correct fix would to convert the OAuth dialogs to activities/DialogFragment but that is more work and can be done later.
Update original gradle support for current master
Add gradle wrapper to ease building with gradle

Add support for maps-with-me in gradle build

Update libraries for gradle build
Add files/directories used by gradle/Android Studio to .gitignore
Merge pull request #3840 from rsudev/issue96

Implements #96, Change log / What's new popup on start
Update changelog_master.xml
Let popup themes inherit from base cgeo themes, removing duplicate theme item definitions
Fix Actionbar spinner in Light Layout, fixes #3858
Fix issue #3865
Merge pull request #3868 from schwabe/issue_3865

Fix issue #3865
Merge pull request #3867 from schwabe/theme_cleanup

Theme cleanup
Convert DateDialog and CoordinateInputDialog to DialogFragments, closes #3852
Merge pull request #3850 from schwabe/fix_oauth_dialogs

Don't let the OAuth dialogs use the Dialog theme
crowdin: New translations
Merge pull request #3870 from rsudev/crowdin_translations

crowdin: New translations
crowdin: New translations
Merge pull request #3873 from rsudev/crowdin_translations

crowdin: New translations
Merge pull request #3869 from schwabe/fix_iusse3852

Convert DateDialog and CoordinateInputDialog to DialogFragments, closes #3852