[client][buttonsmanager] create empty manager file
[client][buttonmanager] base structure
[client][buttonmanager] implement outer button creation
[client][buttonmanager] enable ranking when creating buttons
[client][buttonmanager] can set attributes on created button
[client][buttonmanager] implement inner buttons
[client] define sidebar buttons with the new buttonmanager
Merge pull request #158 from Paulloz/buttonmanager

Fixes #130
Merge pull request #159 from rajkit/commandManager
directly use coffee
safize notfounds from DB
Fix the validation flow in the WSServer
add grunt dependencies to package.json
share room via mail
fix copy/paste error in share room by email
Merge pull request #164 from Paulloz/mailshare

Mailshare
generalize popovers creation in buttonManager. Fixes #166
forgot the dependency on nodemailer in package.json (#167)
front-end for bug report
Use master of grunt-docco for supporting latest docco version