add feature: add/remove thread to attention list
fix message
fix bug: use server notice thread list to update local cache of attention threads, so user will get more accurate ‘attention’ status
add feature: notice thread list support ‘read’ color
fix bug: attention threads has wrong read status
add feature: if attention threads have multiple repliers in notice list, displaying the first replier name plus ellipsis
Merge branch 'master' of https://github.com/wujichao/hipda_ios_client_v3
fix project file: miss HPAttention.m/h
Merge pull request #3 from nkcfan/master

add feature: add/remove thread to attention list