- Added design for mech fabricator circuitboard.
- Added origin_tech for some mech equipment.
- Examining mecha chassis will show what construction step you're currently on.
- Made Gygax construction reversible.
- Moved global_iterator.dm and construction_datum.dm to code/datums/helper_datums
- Split mecha_construction.dm into mecha_parts.dm and mecha_construction_paths.dm
- Fixed wrong logic for mecha dna-checks.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1402 316c924e-a436-60f5-8080-3fe189b3f50e