Prepare bill of materials

[AlexSatrapa]

Given an outpost spec procyon-iii.yml:

- Landing Pad - Small
- Industrial Workbench
- Wind Turbine - Advanced: 3
- Extractor - Copper
- Storage - Solid - Large
- Extractor - Fluorine
- Storage - Gas - Large
- Extractor - Ionic Liquid
- Storage - Liquid - Large

This can be processed with the outpost command to produce a bill of materials:

$ outpost bom procyon-iii.yml
- Adaptive Frame: 30
- Aluminum: 77
- Copper: 23
- Iron: 51
- Isocentered Magnet: 6
- Nickel: 24
- Tungsten: 18