Merge pull request #34 from junshiguo/master

add user home page
last topics from friends
last posts ui
add docs item
load more posts in user home page
optimize ui
fix friend bug, add view detail of fresh event, change display of new users
Merge pull request #35 from RenchuSong/master

fix friend bug, add view detail of fresh event, change display of new us...
invite friends to join group; bug fix
Merge pull request #36 from junshiguo/group

invite friends to join group; bug fix
fix bugs and add block users
fix bugs and add block users
Merge pull request #37 from RenchuSong/master

block user implemented
fix bugs and add block users
Merge pull request #38 from RenchuSong/master

Update Process
group administration
comment administration
add docs
code reformat
topics administration