issue_136: use bootstrap-sass gem
issue_136: flash when finish adding expense/income
issue_136: fix missing validation for category, payment, payment type. Better form alignment for category and payment type
issue_136: remove button should be red, add button should be green
issue_136: better info when delete and create/update expense/income
issue_136: ujs for date picker
issue_136: shorter date when list, reorder column
issue_136: tigten validations, fix date picker modify preset date by accident, default amount is empty
Merge branch 'issue_136' into financial