Added Yii as submodule
Updated Yii to 1.1.13
Change index example to use yii submodule
Moved yii into protected
Change yii path in example index file
Use https for yii
Fix ambiguous relations and conditions
disambiguate fields
disambiguate fields
Allow null params for event
Merge branch 'release/1.4-moorfields' into feature/contacts

Conflicts:
	protected/models/Patient.php
	protected/models/Practice.php
	protected/models/Site.php