add ng-csv
use ng-csv in index.hic
add ng-csv to app's deps
add Export button in history
add navbar-ctrl
add auto-save interval to config
implement auto-save
add auto-mode checkbox in records
if auto-mode is checked, new record will be added to produce automatically
add assoc-contract! util function
assoc records with contract when producing multiple templates
history should show contract column
use navbar-ctrl in navbar