Generic cashflow fragments
Reorganize ui.cashflow package
Proper handling of rotation
Reorganize ui.wallet package
Reorganize ui.dashboard package
Remove ui.contractor package
Reorganize ui.category package
Apply ButterKnife to ui.category
Fix ui.category
Refactoring
Drop unique wallet name constraint and better state handling in wallet fragment
Fix manage of current fragment tag
Drop unique category name constraint and better state handling in category fragment
Apply ButterKnife to ui.cashflow and other refactoring. (Editing cashflow may not work)