What should the new feature do?

1. Open character inventory- IronChest items in inventory are not recognized and sorted with other items.
2. Open any IronChest inventory- Chests are not recognized as a container by Inventory Tweaks. The UI button in the top right corner does not appear and items cannot be sorted within.

How to add compatibility:
IronChest related items need to be added to the "Item Tree" for Inventory Tweaks to allow them to be sorted with other items in the inventory:
https://inventory-tweaks.readthedocs.org/en/latest/#tweaking-the-item-tree

IronChest containers need to be added to the ‘config/InvTweaksCompatibility.xml’ file for Inventory Tweaks to add sorting compatibility and UI button:
https://inventory-tweaks.readthedocs.org/en/latest/#adding-configured-compatibility-info

What version of the mod are you using?
ironchest-1.8-6.0.87.745-universal
What version of Minecraft are you using?
1.8
Should there be a config option to enable/disable the behavior?
N/A