Allow customer user error codes on a per-client basis
Specify a lower version of httparty to be compatible with Ruby 1.8.7
Try even lower version (would be great if httparty documented it's support)
Merge pull request #5 from greysteil/custom-user-error-codes

Allow customer user error codes on a per-client basis
Remove some >1.9 syntax; fix specs using described_class
Fix travis on Ruby 1.8