Allow overriding the s3 endpoint domain for use with Google Cloud Storage, updated the public URL for files to load through Fastly instead of directly from S3

lib/transports/s3/remote.js

 
 module.exports = function(bucket, storagePath) {
 
-  var s3 = new AWS.S3({ params: { Bucket: bucket } });
+  var s3 = new AWS.S3({
+    params: { Bucket: bucket },
+    endpoint: process.env.S3_ENDPOINT || 's3.amazonaws.com'
+  });
 
   // Test credentials
   s3.headBucket({}, function(err){ if (err) { throw err; } });
 
     var params = {
       Key: storagePath + key,
-      Body: fs.createReadStream(source),
-      ACL: "public-read"
+      Body: fs.createReadStream(source)
     };
 
     // gzipping results in inconsistent file size :(
-    s3.upload(params, cb);
+    s3.putObject(params, cb);
 
   }
 
 
   // TODO make this more configurable
   function getURL(id) {
-    return "https://s3.amazonaws.com/" + bucket + "/" + storagePath + "video/" + id + ".mp4";
+    return "https://" + bucket + "/" + storagePath + "video/" + id + ".mp4";
   }
 
   return {