Revert "adds category model"

This reverts commit 57ae86b72453045f4b3ccfa29740929269f1c83a.

Conflicts:
	db/schema.rb
	spec/features/user_uploads_logo_spec.rb
Revert "add new upload form"

This reverts commit 5b0c1afbf1897ca54275a62ca1f5446969b5bb92.

Conflicts:
	db/schema.rb
	spec/features/user_uploads_logo_spec.rb