[Bug] urlencoded slashes in routing parameters

# Routing
Current routes do not allow for urlencoded slashes in the paths. This is problematic when trying to create ecommerce solutions with partnumbers in the routes since many part numbers have slashes in them.  There are also quite a few manufacturers with slashes in their names and or brands.  This commit provides the functionality to allow an uri to have encoded slashes, and other characters, in the [routes](http://laravel.com/docs/routing) and also to [create routes with those parameters](http://laravel.com/docs/routing#route-parameters). An example url may be...

https://stage.test.com/part/Cisco%20Systems%2C%20Inc/CISCO2851-SRST%2FK9

thank you!