Paid Memberships Pro – Invite Only Membership Version History

* ENHANCEMENT: Updated the frontend UI for compatibility with PMPro v3.1. #29 (@MaximilianoRicoTabo, @kimcoleman)

* ENHANCEMENT: Updating `<h3>` tags to `<h2>` tags for better accessibility. #27 (@michaelbeil)
* BUG FIX/ENHANCEMENT: Improved compatibility with PMPro Multiple Memberships Per User Add On. #22 (@dparker1005)
* BUG FIX/ENHANCEMENT: Updated localization and escaping of strings. #28 (@dparker1005)
* BUG FIX: Fixes PHP error that gets thrown on archive pages. #24 (@JarrydLong)
* REFACTOR: No longer pulling level from `$_REQUEST` variable. #26 (@dparker1005)

= .3.4 =
* BUG FIX: Fixed display of invite codes in emails.
* BUG FIX: When a user was assigned multiple invite codes, they were not displayed in the email body (array output as string). (Thanks, Matt Sims)
* ENHANCEMENT: Added the display name of the original recipient of a used invite code on the user profile screen. (Thanks, Matt Sims)

= .3.3 =
* BUG: Fixed bug where used codes were counted incorrectly.

= .3.2 =
* BUG: Fixed bug where "codes used" section would show up even if no codes were used.
* ENHANCEMENT: Updates to the display of used and unused codes in the membership confirmation page and user profile.

= .3.1 =
* BUG: Fixed issues where old ->pmpro_invite_codes method was used to check for a user's invite codes.
* BUG: Fixed grammar when showing one invite code in a list.

= .3 =
* Admins can now create additional invites for users.

= .2 =
* Added invite code to account page and confirmation emails.
* Handling the PayPal Express review page better now.
* Forced invite codes to be upper case.
* Now showing used codes and their users along with unused codes on the Account/Profile pages.
* Confirmation, Account, and Profile pages updated to use new code system.
* Added a bunch of new functions for getting, saving, checking, parsing, and displaying invite codes.
* Invite codes now store their parent's user ID in the code, to make checking valid codes faster.
* Added support for multiple codes generated at checkout. Admins can define this with the PMPROIO_INVITE_CODES constant.

= .1 =
* This is the initial version of the plugin.