Improvements:

- Increase attr selector specificity to reduce false positives (See http://jsfiddle.net/adamschwartz/nb597jL0/show/light/)
- Separate out additional link styles (and add to demo)
- Make additional link files an optional include in the `install.json`
- Update README to reflect these changes
Simplify additional link styles and install.json copy

@nicovanzyl since we weren’t including the hover colors, the transitions here weren’t doing anything.

cc: @zackbloom
Match subdomains as well

From @nicovanzyl
https://github.com/nicovanzyl/Chameleon/pull/1#discussion_r16460332
Additional link styles support subdomains as well
Merge pull request #1 from adamschwartz/master

Reduce false positives and separate out additional link styles