Added normalization of IPv6 addresses

* Added IPy IPv6 normalization to server and address models

Change-Id: I1ee8156c9a392620604e9f8738b6e43a124c2091
Cleanup of servers client

* Fixed pep8 issues with servers client
* Added epydoc descriptions to methods

Change-Id: I772b6a8ac897688496ce57146297c87d4cdcb9cc
Merge "Added normalization of IPv6 addresses"