Fixed a bug when deleting a task, added edit button to Project and Sprint views
Updated gitignore
Updated commit link in task, updated CSS
Updated Project view, remove useless files in UserBundle
Implemented incremental IDs
Fixed an error when changing task state
Implemented sprints historic by cloning tasks
Prevented making changes to finished sprints
Fixed a typo
Implemented Burn down charts
Fixed case sensitive issue in sql request
Implemented User Contributions Chart
Prevented making changes to finished sprints, updated css font
Replaced d3.v3.js by d3.v3.min.js
Fixed a typo, updated css
Fixed a css bug in task popup
Implemented User Contributions Charts for tasks done and in progress
Updated global design, added profile settings
Updated home page
Updated css