Merge pull request #18 from lukaw3d/master

Add notes
Merge pull request #19 from lukaw3d/master

Minifix
Merge pull request #20 from lukaw3d/master

Accepting / rejecting stories (ProductOwner)
Merge pull request #21 from lukaw3d/master

Add a note while rejecting a story
Merge pull request #22 from lukaw3d/master

Fix: Task complete button instead of remaining == 0
Added richQuery util
Sprint.query returns sorted sprints with numbers, current and next flag
Story.query returns stories with related sprints
Product backlog, adding stories to sprints, refactoring
Stories sprints logic
canAddUnfinishedStoryToSprint extra limitations
* time logging
Add step to input in task-time-modal
Reload current user if editing his roles
Add to sprint button recolor
Minifix: stories without tasks are not completed
Minifix: dont null on input over max in TimeLog
Error border also on focus
Minifix: if user input backspaced (""), remove it
Better autocomplete (if you type full name you can still tab at the end)