Merge pull request #4 from r4bugento/master

Only authorized users can access a project backlog and a board
remove task in board
create a new task in board
add sprint name in board
if all tasks going to everyone the definition of ready is concluded
if all definitions of ready are completed, the story gets status complete.
fix bug launch sprint
getting users to add via ajax
tables 'Sharing' and 'Role' created
globals variables created (JS)
refactoring
JS separate
adding people to a project
only add people who are not part of the team
listing members of the project
listing projects that the user am part
members of the project can access backlog and board
editing role
adding multiple people to a project
only member and owner can access team's page