-finished implementing currencies
-Started implementing tag filter
-Fixed various bugs in add item
-Added SQL Trigger to Database Schema to prevent deletion of participants still used
-Fixed bug that lead sometimes to app crash while attempting to delete a project
Merged Strings.xml
-Fixed a view bugs ins ContentProvider and Database
-All numbers show up with default currency.
-Few other bugfixes
-Fixed bug in add_item
-Fixed bug in ContenProvider Contract
-Fixed Bug that made App crash if Finalize Button was clicked.
-Changed Button layout and played around with app Theme
-Merged gui_upgrade into chrissy_branch