http client timeout should be set to non-infinity default

[kriptor]

Inside quote.go client := &http.Client{} is used but we should have some sane timeout setting there. E.g.: client := &http.Client{Timeout: 10 * time.Second}

Even better, there should probably be a way to inject your own http client.

[markcheno]

Good idea, added it in all the calls.

Thanks.