Add a client that doesn't deal with HTTP Errors

[JulienTant]

In some case, you might want to decode the error message returned by an HTTP server. In the current implementation of the client, when a HTTP error is catch by the decoder, it skips the decoding and return directly the HTTPError. With this version, the client will have to deal with the HTTP Error while decoding.

[coveralls]

Pull Request Test Coverage Report for Build 118

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.7%) to 78.996%

---

Totals
Change from base Build 109:	-0.7%
Covered Lines:	850
Relevant Lines:	1076

---

💛 - Coveralls