Add the ability to set API info (title, description, license, terms and contact email)
Merge branch 'api-info' of github.com:mattbeedle/grape-swagger into mattbeedle-api-info

Conflicts:
	lib/grape-swagger.rb
	spec/api_models_spec.rb
	spec/default_api_spec.rb
	spec/hide_api_spec.rb
	spec/non_default_api_spec.rb
	spec/simple_mounted_api_spec.rb