core: user: use one() if possible
core: post: use one() if possible
core: friend: fix error \mee\DataType not defined
fix friend system
fix friend request
fix friend system
fix possible error
PHP doesn't allow null here
the right way to handle this situation
fix notification and friend request
fix "hide comments" button when comments more than 10
fix "hide comments" button when comments more than 10
fix ajax cannot handle new-line character
Merge branch 'master' into sync-mee-experimental