minor adjustments
add an icon to login page
resolve conflict
Merge branch 'master' of https://github.com/guozheng/ios_flickr_group into li
open flirk signup when clicking register on login page
update get topic list by group id to add count per page and page number params
adjust to the black theme and icons
Merge pull request #22 from guozheng/update-my-groups

Update my groups
Merge branch 'master' of https://github.com/guozheng/ios_flickr_group into li
remove all xcuserdata data from repo