Custom service container for package

For some reason we have to create a custom service container for using this package in laravel
i hope this problem gonna fix in main repo and we can use and enjoy. :)

problem was a load function without parent function argument .
for more information you can visit
jonnnnyw/php-phantomjs#225

Docs and requirements

Write usage docs and move provider and facade file from directories into source directory.
Update requirements of composer file and readme file.

Initial version

0.0.1

Fixed loading config file in provider