Update supported node versions.

Author: Justin Latimer

midi.js

@@ -1,11 +1,4 @@
-// Node version 0.4.0 and 0.6.0 compatibility
-try {
-  var midi = require('./build/Release/midi');
-} catch(e) { try {
-  var midi = require('./build/default/midi');
-} catch(e) {
-  throw e;
-}}
+var midi = require('./build/Release/midi');
 
 // MIDI input inherits from EventEmitter
 var EventEmitter = require('events').EventEmitter;

package.json

@@ -19,7 +19,7 @@
     }
   ],
   "engines": {
-      "node": ">=0.4.0"
+      "node": ">=0.6.0"
   },
   "repository" : { 
     "type" : "git",