Dual-cardbox mod for Steampunk Rally Box Insert

Dual-cardbox improvement for reveman's original design:

* merged card boxes to keep part piles and their discard piles together
* double cog box, also merged (split 1's and others separate)
* double invertor card box, merged (keep hint cards separate)
* slightly modified dimensions of every piece to better fit box (but still fit cards/pieces)
* all sleeveless variants (inventor box is a shrunk version of the sleeved variant for better fit)
* machine part dual boxes snap on top of discard boxes
* inventor dual box snaps on top of dual cog box (both shrunk significantly for better overall fit into original game box)

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Also check out my special character stand designs: https://www.thingiverse.com/thing:4198785