fixed travis.yml && added nmp test script

.travis.yml

@@ -8,4 +8,6 @@ before_script:
 script:
    - "jshint *.js lib"
 after_script:
-  - npm run-script gulp
+  - npm run-script build
+  - npm test
+

dist/ethereum.js

@@ -277,6 +277,7 @@ module.exports = {
     methodSignature: methodSignature
 };
 
+
 },{}],2:[function(require,module,exports){
 /*
     This file is part of ethereum.js.

package.json

@@ -31,7 +31,8 @@
   "scripts": {
     "build": "gulp",
     "watch": "gulp watch",
-    "lint": "gulp lint"
+    "lint": "gulp lint",
+    "test": "mocha"
   },
   "repository": {
     "type": "git",