Refactor client to use a middleware stack [#6]
Add specs for Middleware::Base
Add tests for adapter
Middleware::Adapter adds the content type to the response from the raw response
Middleware can decide whether to process a response based on its content type
Middleware can set the path being used for the request
Merge branch 'master' into middleware

Conflicts:
	lib/stacker_bee/body_parser.rb
	lib/stacker_bee/client.rb
	lib/stacker_bee/connection.rb
	lib/stacker_bee/graylog_faraday_middleware.rb
	spec/units/stacker_bee/client_spec.rb
	spec/units/stacker_bee/connection_spec.rb
	spec/units/stacker_bee/request_error_spec.rb
	spec/units/stacker_bee/response_spec.rb
Fix for travis?
Merge branch 'master' into middleware

Conflicts:
	lib/stacker_bee/connection.rb
	spec/units/stacker_bee/connection_spec.rb
Bump version number