Add new laravel workbench project structure

I have no plan to write test for this package for now and I don't really
know how to do TDD.

I've removed '.travis.yml' as well because I won't
be needing that since I'm not writing any tests.

I prefer to abstract the classes that needs to be autoloaded into a
directory called 'lib' and everything else will be put under the 'src'
directory.

I've also updated the service provider to point to the correct 'src'
path.

Nevertheless, I hope this project will come to its fruition A.S.A.P.