Adding an extra test for calls w/ multiple params

Testing for calls with multiple parameters which requires extra encoding, eg. contains '&' or ',' to be encoded
Introducing extra encoding layer in multi requests

Quoting the params of the multi requests to make sure they will fit in as a value for the "requests=" parameter

Eg.{offset: foo, limit: bar}
-encode to convert to valid query string: offset=foo&limit=bar
-quote to encode the special chars like '&=': offset%3Dfoo%26limit%3Dbar
Merge pull request #56 from elcrimer/patch-1

Patch 1