does not work with gtfs-realtime.proto

[mbflex]

Google defined the so-called GTFS-realtime interface in 2011.
https://developers.google.com/transit/gtfs-realtime/

The interface is implemented using protocol buffers. The proto file can be found here:
https://developers.google.com/transit/gtfs-realtime/gtfs-realtime-proto

I try to use ProtoBuf.js to work with this proto file:

var ProtoBuf = require("protobufjs");
var builder = ProtoBuf.protoFromFile("gtfs-realtime.proto");

This causes an error:
...ProtoBuf.js:572
throw(new Error("Illegal top level declaration: "+toke
^
Error: Illegal top level declaration: syntax
at ProtoBuf.DotProto.Parser.Parser.parse (..ProtoBuf.js:572:31)
at Object.ProtoBuf.protoFromString (..ProtoBuf.js:2592:33)
at Object.ProtoBuf.protoFromFile (..ProtoBuf.js:2634:53)
at Object. (..test.js:6:24)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)

[dcodeIO]

There seem to be two statements that are not understood by ProtoBuf.js yet: syntax = "proto2"; and extensions 1000 to 1999;. You can try to remove or comment-out those until I get some time to fix the parser to just ignore it.

[mbflex]

You can try to remove or comment-out

Thanks, seems to work so far.
Thanks for the nice library. I just started to work with your stuff. Except for the reported issue, your library works fine for me.

[dcodeIO]

I've added the required ignores and a test case to validate that it'll compile without modifications.