start move of services to resources
update api of account resource
change references of account service to use account resource
update transaction resource api
start work on transaction service
fix create and update transaction
fix account crud
add transaction destroy
Merge commit '976b4eaf5a180398c3ea555b9568f50853a67339' into develop

* commit '976b4eaf5a180398c3ea555b9568f50853a67339':
  Create README.md
rename account.balance to account.initialBalance
tweaks to transaction validation and accounts index page
change style of account date range selector
always show the account when adding a transaction
update bower.js file
add bootstrap-datepicker
add bootstrap date picker to date directive
update yeoman project (grunt, bower and modules)
update license