Beggining of feature tests for shibboleth
More tests for shibboleth with institution and move helpers to separate file
Organizing feature helpers a bit

Conflicts:
	spec/spec_helper.rb
	spec/support/feature_helpers.rb
Some tests for login and registrarion via shibboleth
Some tests for when shibboleth should fail
Small additions to shib tests so that they pass with institutions
Merge branch 'branch-v2' of https://github.com/mconf-rnp/mconf-web into branch-v2

This merge got messy, but here are the shibboleth test. I'm sorry :(

Conflicts:
	spec/features/shibboleth/user_signs_in_considering_institution_spec.rb
	spec/support/feature_helpers.rb