callback
late night optimizations

-isMemberOfSets returns true/false instead of 1/0
-when loading the posts of a topic only get the userdata for each user
once, before this commit if a topic had 10 posts from 2 different users
we were getting the user data for each user 5 times (drunk)
-getVoteStatusByPostIDs and getFavouritesByPostIDs no longer make
pids.length calls to the db, they use isMemberOfSets now
-getUserInfoForPost renamed to getUserInfoForPosts and doesnt make
uids.length calls to db, uses getMultipleUserFields instead
removed timing
missing comma fix
Merge pull request #1764 from daxingplay/master

missing comma fix
privileges.posts.get takes an array of pids now
Merge branch 'master' of https://github.com/NodeBB/NodeBB
dont error when no teaser data
remove listeners before adding
blockquote fix again
remove dupe code
cleaned up resizeStop
setOnEmpty
moved meta up
not used
move cursor to end
single arrows wont go all the way to bottom
fix language string
added eachLimit to upgrade script
closes #1769