Add missing methods and use them where applicable.
Merge branch 'bs-versions' into bs-remove-domhelper
Add specs for createStyle and loadScript.
Add DomHelper missing specs.
Use the internal document reference instead of the global one in DomHelper.prototype.whenBodyExists.
Merge branch 'master' into bs-remove-domhelper
Merge branch 'master' into bs-remove-domhelper
Merge pull request #123 from typekit/bs-remove-domhelper

Add methods to DomHelper