Added Payment and Contact section

Common Service, small changes in preview layout

Preview pages for an invoice. New controller for handling preview page, refactoring main controller, added service

Started working on service dedicated for sending data to preview page

Implemented ng-grid for management of invoices

Handles ngBlur events

DS_store file was removed

Updated .gitignore

Added ng-grid library

Modified index.html

rblInput directive and some basic configuration

Removed a file.

Init client app.

Initial commit