Use ajax to fetch group/share repos in myhome
Fixed log out error
Handle get system library exception
[optimization] cleaned up css, combined css files, use css sprite; cleaned up js
[myhome] optimization: use ajax to fetch grp/contact data for repo share
[repo] improved dir private-share
Remove useless check in listing share links
Update footer.html
[jstree] compressed and added jstree.js to jq.min.js
[enc repo] compressed and combined js files for enc repo create/visit
[myhome lib] fetch shared/grp repos when DOM ready instead of when clicking tabs
[myhome lib] added loading tip for grp/shared repos
improved top-grp-popup; fixed image missing bug in grp-list page
optimized images, used seahub.min.css, updated timestamp for static files
Fixed icon bug in listing share repos
Merge branch '3.0'

Conflicts:
	seahub/templates/snippets/my_owned_repos.html
	seahub/urls.py
	seahub/views/__init__.py
	seahub/views/ajax.py
	seahub/views/repo.py