add :request_type option
add :request_type explanations
fixes
add :request_type (:params) explanation
add license to gemspec
accept string for :request_type option

* add string type :request_type option for supporting omniauth
configuration in gitlab.yml
* update spec descriptions
add flexible attribute configuration function
add gem version and travis status
fix readme
fix readme
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/omniauth/strategies/shibboleth.rb