Add gradle build script
Add gradle build script
Remove contributing info from readme to a it own file
Add contributing info
Minor fix to prevent double charges of sms
update german translation
Add Greek translation
Close a cursor at the right line.

This prevents the app from crashing when importing huge data. Also added
a base test file
Reformat code to androd coding standard
A bit of code formatting
Add contributing info
Move contributing info to it own file