adding groundwork for assigning via ajax
Send values in json format
cleaning-up javascript
Merge branch '2283_assign_story_from_agile_dashboard' of tuleap.net:tuleap/tuleap/dev into 2283_assign_story_from_agile_dashboard
Send username in JSON format
Typo
Fix select order
Send the id of the value as well
refactoring js
adding select2 animation
step in story #2260

* Now provisioning correctly the selectBox
* Correct display for avatars
* Clean up *.php
fixing tests
update selected users after change
now adding img element to the DOM only if source exists
fix display of input when there isn't any pre-selected assignee
moving code and adding height css for avatar
refactorings
Merge stable/mstaer into 2283_assign_story_from_agile_dashboard

Conflicts:
	plugins/agiledashboard/www/themes/default/css/style.css
	plugins/cardwall/www/script.js
	plugins/tracker/include/Tracker/FormElement/Tracker_FormElement_Field.class.php
re-adding editing permission
moving js into proper file