Fix includes on case-sensitive file systems

lib/dataconnection.js

@@ -1,5 +1,5 @@
 var util = require('./util');
-var EventEmitter = require('EventEmitter3');
+var EventEmitter = require('eventemitter3');
 var Negotiator = require('./negotiator');
 var Reliable = require('reliable');
 

lib/mediaconnection.js

@@ -1,5 +1,5 @@
 var util = require('./util');
-var EventEmitter = require('EventEmitter3');
+var EventEmitter = require('eventemitter3');
 var Negotiator = require('./negotiator');
 
 /**

lib/peer.js

@@ -1,5 +1,5 @@
 var util = require('./util');
-var EventEmitter = require('EventEmitter3');
+var EventEmitter = require('eventemitter3');
 var Socket = require('./socket');
 var MediaConnection = require('./mediaconnection');
 var DataConnection = require('./dataconnection');

lib/socket.js

@@ -1,5 +1,5 @@
 var util = require('./util');
-var EventEmitter = require('EventEmitter3');
+var EventEmitter = require('eventemitter3');
 
 /**
  * An abstraction on top of WebSockets and XHR streaming to provide fastest