Added HHVM and 5.6 to travis

Using PHPUnit from composer

Author: shabbyrobe

.gitignore

@@ -1,3 +1 @@
-.buildpath
-.settings
-.project
+vendor/

.travis.yml

@@ -2,8 +2,11 @@ language: php
 
 before_install:
   - git submodule update --init
+  - composer install
 
 php:
+  - "hhvm"
+  - "5.6"
   - "5.5"
   - "5.4"
   - "5.3"
@@ -13,4 +16,4 @@ branches:
     - master
     - develop
 
-script: php test/run.php
+script: php test.php

composer.json

@@ -16,7 +16,10 @@
     "require": {
         "php": ">=5.3.0"
     },
+    "require-dev": {
+        "phpunit/phpunit": "4.1.*"
+    },
     "autoload": {
         "classmap": ["src/docopt.php"]
     }
-}
+}