Disables encoding get() URLs by default

In our app this is leading to errors on URLs that are already properly encoded (they are being double-encoded... %20 -> %2520, etc)

Feel free to ignore or close this one if you need this functionality, but since `post()` URLs were *not* being encoded, I thought it might have just been a default that didn't affect you one way or the other.
Merge branch 'disable-encoding-get-urls' of https://github.com/SpiderOak/cordova-HTTP into SpiderOak