Update README.md

Changed h2 to h3 and improved syntax highlight
Added API filter
Changed name of the api service
Added version of dependency
Update README.md
Fix problem with classmap in composer.json
Updated the user and provider to the new interface change
Changed name of the composer package
Update README.md
Update README.md
Changed apiuser to jwtuser
Update README.md
Update README.md
Merge pull request #3 from patekuru/patch-1

Update README.md
Adding api example
Changed version for dependency
Merge branch 'master' of github.com:auth0/laravel-auth0 into api-example

* 'master' of github.com:auth0/laravel-auth0:
  Changed version for dependency
Changed version for 4.* for laravel 4.*
Merge branch 'master' of github.com:auth0/laravel-auth0 into api-example

* 'master' of github.com:auth0/laravel-auth0:
  Changed version for 4.* for laravel 4.*
Added working composer
Continuing sample