Merge pull request #16 from lukaw3d/master

Use new APIs
Removed (possibly wrong) validation when adding tasks
Validationless modifying of tasks
Merge pull request #17 from lukaw3d/master

Task take, task release
Some more task validations
Big blob of task validations
Task validation now allow accepting unassigned tasks
Minifix
Merge branch 'master' of https://lukaw3d@github.com/edofic/scrumble.git
add story notes
flatten lists on story
Add notes view
Merge branch 'master' of https://lukaw3d@github.com/edofic/scrumble.git
Revert "flatten lists on story"

This reverts commit 88eb69d6da4632f502bf62092234b78f4b3557dd.