Merge pull request #1 from haxecocktail/fixed-dom-tokenlist

fix use of DomTokenList updated in cocktail-dom
Merge pull request #2 from haxecocktail/buddy

switch to using buddy
added selector pseudo-class parser + tests
added pseudo element parser + tests
added attribute parser
added class to manage selector metadata + tests
main selector parser uses sub-parsers
make the selector parse a static class
adding selector parser tests