Account registration implemented

* POST /accounts returns a token that is sent in a secret url to the
registratnt.
* When the registrant clicks the link, a PUT /accounts/:id activates
the account
* Registrant can then proceed to log in.
Password reset implemented
Merge branch 'integration-dev' of github.com:ushahidi/SwiftRiver into integration-dev

Conflicts:
	application/classes/Service/Account.php
	modules/SwiftRiver_API/classes/SwiftRiver/API/Accounts.php
Upgrade Kohana to 3.3/develop

* Bugfixes