[OzzModz] XFRM: Purchasable Resources 2.0.1

Adds paid uploads resource type.

Features:

• Purchasing resources trough XF payment providers
• Tab on resource page with list of purchased users
• ACP resource purchases list & management
• Purchases can be deactivated (to disallow further resource downloads for purchased user)
• Purchase alerts for resource author

Spoiler: Rest API endpoints