Moved credit creation to ruby client gem
1) tests for credit creation, 2) addition of new username and pwd fields in spec helper, 3) update readme
1) tests for credit creation, 2) addition of new username and pwd fields in spec helper, 3) update readme
1) modify readme, 2) fix test missing should, 3) changed test auth creds to default killbill server creds
Merge pull request #7 from devaroop/master

Moved credit creation to ruby client gem