Merge pull request #127 from sharoonthomas/develop

Add Cache clearing into dispatch
Update available versions on README
Refactor address addition/editing #3464

* Move creation of address to create_address method. The ability to add
  new addresses from edit_method will be deprecated from 3.2.x.
* A deprecation warning is shown where required.
* Make a helper function to manage contact mechanism in party.
* Add a new create-address URL.