Switched to implement.js for interface assertions

So, we can remove our own `implements` assertion.

homelib.js

@@ -12,6 +12,5 @@ module.exports = {
     Message: require(path + 'Message'),
     Module: require(path + 'Module'),
     Connection: require(path + 'Connection'),
-    Timer: require(path + 'Timer'),
-    assert: require(path + "assert")
+    Timer: require(path + 'Timer')
 };

package.json

@@ -10,6 +10,7 @@
     },
     "dependencies": {
         "async": "~0.8.0",
+        "implementjs": "~0.3.0",
         "suncalc": "~1.4.0",
         "underscore": "~1.6.0"
     },

src/Connection.js

@@ -1,7 +1,7 @@
 var Driver = require('./Driver/DriverInterface'),
     Message = require('./Message'),
-    invoke = require('underscore').invoke,
-    assert = require('./assert');
+    impl  = require('implementjs'),
+    invoke = require('underscore').invoke;
 
 /**
  * The connection object represents an interface to the knx
@@ -16,7 +16,7 @@ function Connection(driver) {
 
     var self = this;
 
-    assert.implements(driver, Driver);
+    impl.implements(driver, Driver);
 
     this._driver = driver;
     this._listeners = {};

test/Driver/KnxIpDriverTest.js

@@ -8,7 +8,7 @@ var Buffer = require('buffer').Buffer,
     chai    = require('chai'),
     assert = chai.assert,
     expect  = chai.expect,
-    implements = homelib.assert.implements;
+    implements = require('implementjs').implements;
 
 describe('KnxIpDriver', function() {