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* Remove superfluous "Edit This Page" button (Neal Todd)
* Fix: Add form media to templates for Wagtail >= 2.3 compatibility (Neal Todd)
* Fix: Handle unspecified ParentalKey related_names (Andy Chosak)
* Centralise Wagtail 1 / 2 imports into a compat module (Sultan Iman)
* Fix: Decode utf-8-sig files (Rodolfo Lottin Pereira)
* Additional support for Wagtail < 2.0 (Rodolfo Lottin Pereira)