Actually include all necessary views with twigg-app gem

I've been developing straight out of the Git repo until now, but now
actually starting to test with the released gem has revealed that we
weren't actually shipping most of the needed templates for the twigg-app
gem to function.

Change-Id: I9ea20d91a7ade15f16c4fa7e7693d1c680e4196e
Reviewed-on: https://gerrit.causes.com/27606
Reviewed-by: Greg Hurrell <greg@causes.com>
Tested-by: Greg Hurrell <greg@causes.com>