Add gtfs format and test.

Travis fixes

Fix tests now that Shapefiles are detected. (although test_wmts needs https://github.com/ckan/ckan/pull/2867 merging before Travis will go green)

Order json by score

I found it immensely hard to read before.

Also, emacs ftw :)

Run tasks per-package rather than per-resource

Convert report template to jinja.