Merge pull request #13 from guozheng/li

redesign addGroupsView to match myGroupView. Implement the search functi...
Merge pull request #14 from guozheng/li

resign searchbar in addGroupView and myGroupsView when scrolling the tableview
Merge pull request #15 from guozheng/li

implement getGroupTopics
Merge pull request #16 from guozheng/li

work on groupDetailsView
Merge pull request #17 from guozheng/li

Li
Merge pull request #18 from guozheng/li

Li
Merge pull request #19 from guozheng/li

add delete permission in login
Merge pull request #20 from guozheng/li

resign the searchbar when swiping the SWTableViewCell
update group details table view a bit
swipe experiment
Merge branch 'master' of https://github.com/guozheng/ios_flickr_group into li
lots of small changes.