added media object, to be used with images, floor plans, and epcs.
Merge branch 'develop' into feature/Api_Interface_Definition

Conflicts:
	src/mattcannon/Rightmove/PropertyObject.php
added hips, improved filtering of EPCs in document sections.
Merge branch 'develop' into feature/Api_Interface_Definition

Conflicts:
	src/mattcannon/Rightmove/PropertyObject.php
added mapping for most fields.