[PROJECT IDEA] Get public validator running on heroku

[andylolz]

Rationale

The public validator has now been removed. The new validator does not offer all of the same services – for instance, there is no way to make a GET request with a dataset URL. The dashboard uses this service.

In order to maintain this service, I wonder if it’s worth getting the public validator running at http://validator.codeforiati.org ?

Proposal

I think we could probably get the validator running on heroku fairly easily. We’d need to change the design to remove IATI logos, to avoid confusion.