[XenTR] Exclusive Dark 2.2.15

Upgraded to xenForo 2.2.1

• XenForo v2.2.13 compatibility.
• All templates are now compatible with XenForo v2.2.13 Release.

support xf 2.2.12

XenForo 2.2.8 Compatibility Update

All outdated templates are updated to 2.2.8 and also confirmed XF v2.2.8 compatibility.
Template modifications are updated.

Edited and optimized