Pill attachment strategy

Need to connect two parts semi-permanently? This might be the thing to use, Just substract `pill_sub()`(`pill_sub.stl`) on the two parts to connect, compress, and pop the 'cylinder pill'(`fat_pill` if you want it to be tighter) in, and then pop the other part on that.

This entry contains the pill and `pill_sub` as development aid.

Place of development is currently [github](https://github.com/o-jasper/various_physibles). (Also released on [fabfabbers](http://www.fabfabbers.com/models/id/16