Feature add composer and tweaks

Hi,
I created a composer package based on your work. I also made it backward compatible with php v5.3.*. When tested, it should install and function with no problems using:
```json
   "require-dev": {
        "psychomieze/sauceextension": "dev-feature-add_composer_and_tweaks"
    },
```
```json
"repositories": [
        {
      "url": "https://github.com/mhightower/sauceExtension.git",
      "type": "git"
        }
    ]
```
follow the updated README.md for additional installation information.
I hope it is ok to put your info in the composer.json information. This still needs to be added to the packagist.org if you want to merge it.

Thanks