docs(adaptiveScroll): adds documentation for adaptive.scroll

I think we need to add some more examples here but its a start so... :)
Merge branch 'master' into docs
Merge pull request #13 from PascalPrecht/docs

docs(adaptiveScroll): adds documentation for adaptive.scroll
Merge pull request #14 from angular-adaptive/canary

docs(adaptiveScroll): adds documentation for adaptive.scroll