WeiboAdapter: Implement interface instead of using unnamed class
WeiboAdapter: Clean up
WeiboAdapter: Do not show image if scrolling
WeiboAdapter: Set OnClickListener to null when recycled
SingleActivity: Fix Layout
WeiboAdapter: Show empty imageview in main thread
WeiboAdapter: Introduce ArrayDeque to speed up scrolling
AsyncTask: Fix not invoking "onPostExecute" if null
DirectMessageConversationActivity: Implement DM Sending
MainActivity: Fix Fragment switching
DirectMessageConversationActivity: Improve layout
Libs: Import SlidingUpPanel
DirectMessageConversationActivity: Emoticons
SingleActicity: Use SlidingUpPanelLayout
SingleActivity: Copyright
WeiboAdapter: Refactor original post building logic

improve smoothness