Removed unused variable
Removed Subsite::set_allowed_domains()

Removed documentation and code since the method has been throwing user error since 2010-03-01
Adding docblocks and visibility keywords to methods
Reorder methods and variables to follow the SS coding conventions

The coding conventions is mentioned here http://doc.silverstripe.org/framework/en/trunk/misc/coding-conventions#class-member-ordering
Merge pull request #121 from stojg/pr/cleanup

Minor cleanup of subsite code