Merge pull request #92 from timbueno/master

Successfully moved to Dokku
added email templates to api_v1 app
updated email templates
User confirmation not required
Added register endpoint
Removed all "Confirm now" text from welcome emails.
added message to success response for api register endpoint.
commented out csrf endpoint
added user delete api endpoint
Merge branch 'feature/signup' into develop

Added signup/delete account capabilities to the api
added comparison "no cover" image to check against
added missing cover image exception
added compare_images method
set_cover_image_from_url is now able to check against a comparison image before setting
the importer now compares images before setting them on the issue
added basic placeholder "no cover image" image
updated templates to use "no cover image" image when cover is missing.
added "remove_cover_image" and "check_cover_image" methods
added "CleanCoverImages" management command - currently DOES NOT remove images - only checks for them
added processing text readout