update uri_template for Guzzle 4
make response code string (Guzzle 4)
update guzzle client 4
remove multiple guzzle 3 travis tests
[#37] Merge branch 'feature/guzzle-4' into develop
add composer install
clean up / gc
[#39] add resource iterator to get resource info

 * resource list
 * resource options
 * meta information around resource class
gc
composer update
fix phpcs
remove ResourceFactory
fix phpcs
[#40] toString return string '' in exception
[#40] error log message
inject resource dir
test coverage 100%
fix phpcs
use interface and fix docblock
fix docblock