Add respond_to blocks to controller methods

Stops 500 errors when accept headers explicitly sent
Override high_voltage to add respond_to block
Add middleware to send Content-Location header
Merge branch 'master' of github.com:theodi/open-data-certificate into feature-content-negotiation

Conflicts:
	config/application.rb
We don't need you middleware
Add alternate_rails gem
Add before_filter hook to load alternate_rails stuff
fix to pddl identifier

I'd changed this id in the UK version, but not in the other EU
jurisdictions
added initial map code, not interactive as yet
Removed extraneous 'surveyor' gem from Gemfile #518
Resolved Issue 269: Removed devise/shared/links on Forget Password Page
working on fixing login signin inconsistency
Solved issue #368
Merge pull request #492 from theodi/fix-pddl-id

fix to pddl identifier
Merge pull request #489 from theodi/feature-content-negotiation

Fix content negotiation issues
Fixed bug #214 by overriding the devise reroute with an additional method
Solves #253
Edited _auth_bar.html.haml to reflect changes in en.yml
readme formatting
Merge pull request #519 from Pavling/RemoveSignInSignUpFromForgotPasswordPage

Resolved Issue 269: Removed devise/shared/links on Forgot Password Page