Add support for chemicals as camos on framed blocks

[XFactHD]

Changes proposed in this pull request:

Add FramedBlocks integration to support chemicals as camos on framed blocks.

A few noteworthy points:

• I've left a TODO about light emission as this is currently not exposed by the chemical itself and instead only available at the IChemicalConstant level
• I've left a TODO about MapColor as the chemicals of course don't have any, considering they are never placed in-world. Returning null will fall back to the framed block's map color. It might be interesting to store a mapping of chemical->map color in the integration which is automatically computed from the chemical's color representation Addressed
• Adding and removing a chemical camo currently consumes and returns respectively the same 1000mB as the fluid camo does
• Stepping/falling on, hitting and breaking a block with a chemical camo uses the stone sound type for now. Fluid camos have the same issue and I have not found a satisfactory solution for this yet Addressed

[pupnewfster]

Looks great, thanks! I will try to test it tomorrow, and assuming I don't run into any bugs, and that it doesn't accidentally introduce a hard dep on framed blocks I will go ahead and merge it afterwards.