feat(client/js/*/uploader.basic.js): #1252 - Allow to change successEndpoint per upload

I implemented the feature request #1252. I basically cloned the *uploadSuccessParams* behavior, as indicated by @fschwahn in his comment. This code was tested with S3, but **not with azure**.

To change the uploadSuccess endpoint, simply call this method with the new endpoint and the file ID:
```javascript
myUploader.setUploadSuccessEndpoint("YOUR ENDPOINT", id);
```
Most likely a leftover from a refactor.


—
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On Tue, Sep 23, 2014 at 9:50 AM, Matthieu Allegre
<notifications@github.com> wrote:

>> @@ -126,6 +127,10 @@
>>              this._uploadSuccessParamsStore.set(params, id);
>>          },
>>  
>> +        setUploadSuccessEndpoint: function(endpoint, id) {
> True! Actually I was wondering why `setUploadSuccessParams` was redefined here.
> ---
> Reply to this email directly or view it on GitHub:
> https://github.com/Widen/fine-uploader/pull/1296/files#r17913147