Add a tooltip for each check

[XhmikosR]

...explaining more about what it checks and stuff. Or add links to more info or something like that

[kangax]

Yep, good idea. Thanks.

[XhmikosR]

I think we can use your blogpost for this. If only the headers had anchors we could do something like http://perfectionkills.com/jscritic#global-variables etc

[kangax]

Added anchors to blogpost. Will think of a good way to hook them up later.

[keleko34]

Could also use a line hinter for what line the issue was detected on.