Add dmfs-Provider constants
Begin to refactor code
Some testing needed
Need to do same for Lists
Need to reimplement ContentProvider
More Refactoring
For #127
Fix Db-transactions
Try to implement first demo of new Contentprovider
Didn't work, Could not find method android.database.MatrixCursor$RowBuilder.add
Next try to rewrite ContentProvider
Merge
Fix list_id handling in new contentprovider
Add some columns to Contentprovider/tasks
Refactoring Contentprovider
Fix Datefilds in Contentprovider
Implement Listquerys in Contentprovider
First try to implement Insert in Contentprovider
Merge
Complet insert in Contentprovider
Improve insert
Implement delete in Contentprovider
Add update in Contentprovider, format and fix same things
Merge with developing