Limit commentsLinksNewTabs to comments

Primarily to stop it touching sidebar links on comments pages. `thing`
might be more appropriate to retain behaviour that people have gotten
accustomed to.
comment > thing
highlight user by user.id, not username

fixes break from lowercased usernames in data
Make clearTag clear user with 0 score
Merge pull request #1093 from gavin19/master

Limit commentsLinksNewTabs to comments
Merge pull request #1106 from andytuba/userhighlight-uppercase

highlight user by user.id, not username
Merge pull request #1108 from matheod/clearTagZero

Make clearTag clear user with 0 score
Added functionality for Photobucket images.
Removed unnecessary option
Merge pull request #1110 from Photobucket/master

Added functionality for Photobucket images.
spaces -> tabs