Add no_response_wrapper as config option

Add no_response_wrapper as a configuration option when instantiating a
client. Then all requests will use this as the default.  Useful if you
want to do pagination or use the other metadata that is not normally
sent back in responses.
Merge branch 'feature/add-no-response-wrapper-option' of github.com:carmi/instagram-ruby-gem into carmi-feature/add-no-response-wrapper-option
Merge branch 'carmi-feature/add-no-response-wrapper-option'

Conflicts:
	lib/instagram/configuration.rb
	spec/instagram/api_spec.rb