Add documentation example for `Element#clone.`
Merge branch 'master' of github.com:sstephenson/prototype
Add polyfill information to documentation for `String#startsWith` and `String#endsWith`.
Fix an issue with a capability check causing an error in IE 10.
Merge branch 'master' of github.com:sstephenson/prototype
Merge branch 'master' of git://github.com/sstephenson/prototype