refactored ACalendarCursorAsEventDto* in preparation of import with minimal code duplicaton for android2 and 4
Refactored namespaces
created abstract Binder interface to hide sql specific stuff behind interface. Extracted android independent EventBinder; renamed ACalendarCursorAsEventDto* to ACalendarEventContent*
Renamed Binder into ColumnBinder and EventBinder into EventRowBinder
Added unittest for calrow;
updated build-tools