Merge pull request #42 from madimalo/master

UI changes and API bug fixes
Merge pull request #43 from madimalo/master

Added the paginator for admin. The stories per page is set to 100 for now.
Merge pull request #44 from madimalo/master

improve the paginating, the performance is better.
add code to clean up posts collection
Merge remote-tracking branch 'upstream/master'
Merge pull request #45 from xiatao123/master

add code to clean up posts collection