make invoices up to date with the api
Merge branch 'mobbr-api-angular#2' of https://github.com/mobbr/mobbr-api-angular into mobbr-api-angular#2

Conflicts:
	mobbr-api-all.min.js
	mobbr-api-msg.src.js
	mobbr-api-session.src.js
	mobbr-api.min.js
	mobbr-api.src.js