Use URL property from upload response

This updates the extension to work with the latest Snap.as API and fixes
the copy-to-clipboard functionality that broke with recent API changes.

uploader.js

@@ -41,14 +41,8 @@ Dropzone.options.uploader = {
 	dictDefaultMessage: 'Drop a file here',
 	init: function() {
 		this.on("success", function(file, resp) {
-			var fp = file.name.split(/\./);
-			var ext = '';
-			if (fp.length > 0) {
-				ext = '.' + fp[fp.length - 1];
-			}
-			var env = JSON.parse(resp);
-			var url = 'https://i.snap.as/' + env.data + ext;
-			copyToClipboard('![](' + url + ')');
+			var data = resp;
+			copyToClipboard('![](' + data.data.url + ')');
 			chrome.runtime.sendMessage({success: true}, function(response) { });
 			window.close();
 		});