Expand subsite core functionality

[ipokkel]

Some functions available in PMPro core could be helpful to expand to be available in the subsite. For example, the global variable $pmpro_pages or the function pmpro_url() to allow redirecting a user from the subsite to specific PMPro pages on the primary network site.

Example:

https://gist.github.com/ipokkel/2d22e1bc0dcc949db5ac171d4e147f02

[andrewlimaza]

This is done! :)