Samsfilter

Added the ability to filter pingdom checks based on url parameter. This parameter filters the checks based on their name in pingdom.
I'd like to see this not extending the `/api/1.0/sams` route to try and keep things as "restful" as possible. Instead of having the route be `/api/1.0/sams/regex` can we have it be `/api/1.0/sams?filter=regex` or something to that effect to not have one off routes for every new feature? I believe it will become very unmanageable very fast as features are added in this fashion.