Fixed total-id-selector reporting

[callumacrae]

This fixes two bugs:

• [href="#main"] was returning "1" when in fact it isn't an ID
• #main was returning "0" when in fact it is an ID

It's difficult to write a regular expression for this without negative lookbehind assertions, so I took this approach instead. I'll probably end up fixing more things in this library (such as the specificity calculator, which is still wrong), if many fixes are like this, I'll write a mini state machine thingy.

It's testing some horrible IDs, but I think that's a good assumption for a quality checker to make.

closes #28

[callumacrae]

Did lodash drop support for node 0.8? :confused:

I can't rerun the tests because I'm not a collaborator, but that might fix them.

[katiefenn]

Thank you for adding this. I've been working on an upgrade to the parser to report selectors more accurately, but I've had less time to work on it than expected. This will help me get a publish a bugfix version onto npm soon :-)