Caching with post requests

[frett27]

using a remote transport with post method, doesn't send the request. because the requestcache make a hit on the cache.

elastic search doesn't support extra parameters for caching timestamp.
i had to disable the cachingrequest check for insuring the request to be sent.

it could be smart to take the post method into consideration.

modified code snippet that work for me :

get: function(query, cb) {
var that = this, encodedQuery = encodeURIComponent(query || ""), url, resp;
cb = cb || utils.noop;
url = this.replace ? this.replace(this.url, encodedQuery) : this.url.replace(this.wildcard, encodedQuery);
/* if (resp = requestCache.get(url)) {
utils.defer(function() {
cb(that.filter ? that.filter(resp) : resp);
});
} else { */
this._get(url, cb);
// }
return !!resp;
}

[jharding]

Duplicate of #562.