issue_118: add link to edit income/expense to amount
issue_120: minor ui change to simplify view
issue_120: custom tab builder, but too complicate to cotinue
issue_120: get rid of the uncompleted custom tab builder
issue_120: remove tabs_on_rails
issue_120: remove knockout
issue_120: change color of navigation bar
Merge branches 'issue_118' and 'issue_120' into financial