added model for Board, a bit of refactoring
added redis for session management
backend changes for board support
client side changes for boards, bug fix for duplicating cards in different boards created consecutively (problem was that I was not passing an empty array for cards when constructing a board object)
server side integration for boards
upgraded backbonejs
added gemnasium
added codeclimate.com tracking
server side integration of cards
server side integration of todos
server side integration for editing board name and card name
Merge branch 'feature/DBintegration' into develop