Params::Check is a generic input parsing/checking mechanism.

It allows you to validate input via a template. The only requirement is that
the arguments must be named.

Params::Check can do the following things for you:
* Convert all keys to lowercase
* Check if all required arguments have been provided
* Set arguments that have not been provided to the default
* Weed out arguments that are not supported and warn about them to the user
* Validate the arguments given by the user based on strings, regexes, lists or
even subroutines
* Enforce type integrity if required