changes tag updates to use ng-if.  Will see if this improves performance
all changable fields now wrapped in ng-if
adds date-based filtering to category totals
adds input type=date
changing to date field on transaction input
moves around layout, especially filters, adds favicon.ico
adds timeout to filters
added help stub
working on help dialog
adds help, embeds exchange rate updates in web app
changes how exchange rate table is built, adds more help
adds google analytics, trying some stuff with account authentication
playing with drobpox chooser
working on performance
major performance improvements by replacing functions with attributes