Added some FilterFields to NewStudentPage
Replaced occurances of 'embedly' with 'embed'
Replaced occurances of 'image_tags' with 'wagtailimages_tags'
Replaced occurances of 'pageurl' and 'rich_text' with 'wagtailcore_tags'
Replaced occurances of 'embed_filters' with 'wagtailembeds_tags'
Import wagtail hooks from wagtailcore
Updated custom routing on ScreensIndex