bring back the pre processing functionnality
update readme
describe internal_ncame
rename values to api_params
assigns stringify hashes ...
use :as instead of :internal_name
use each_with_object to simplify the method and avoid an instance
variable as suggested by @iNecas
oups, fix bad merge conflict
Merge pull request #188 from ifeelgoods/process_values

Add optional functionality to pre process and extract parameters.