Separate out Hosted Pages into Separate Module

With the more extensive options for integration available today for Recurly integration, I think we should split off the functionality for "Hosted Pages" into a separate module. Really I think once we develop a fully featured Recurly module, there isn't much purpose in the hosted pages functionality.

Over in @blasthaus's sandbox for Recurly, (http://drupal.org/sandbox/blasthaus/1534668), he thought the same thing. So let's migrate all that code to a separate module so it's not cluttering up the admin interface with things users don't want. Patches attached that separate this functionality.

At the same time, this change also nixes the filters. If we want to provide recurly tokens in our text, let's implement hook_token_info() and recommend users install Token Filter module. Having a Recurly-specific token filter seems silly.