Original namespace

I'm using this wrapper for myself. I've created a composer package installable from packagist.org. I've created this branch to keep your namespace and contribute my changes. If you want them. Here is what I did: 

* added .gitignore 
* made it psr-0 compatible
* ready to add to packagist.org
* passed through php-cs-fixer (minor fixes, indentation, etc)
* moved ShellWrap.php to src/MrRio for autoloading
* moved examples to new directory
* added LC_ALL=en_US to testDate() to avoid error in non-english environment

NOTE: The diff on ShellWrap is the complete file due to directory changes..