Add ability to pass custom data into breadcrumbs

Closes #35
Merge pull request #56 from levacic/custom-breadcrumb-data

Add ability to pass custom data into breadcrumbs
Update documentation
Load app/Http/breadcrumbs.php in Laravel 5.0
Update docs with new Blade syntax for Laravel 5
Add license badge
fixed: wasnt working on latest version of laravel 5
Merge pull request #57 from freddiecoleman/master

fixed: wasnt working on latest version of laravel 5
Update README.md
Update CONTRIBUTING.md

Use develop branch for new features
Update CONTRIBUTING.md