Re-introduce sex change surgery

Base code ported back from /tg/. It's extremely basic, might still need
some modification, possibly to make it more complex
Revert "Re-introduce sex change surgery"

This reverts commit ba72adbc979b38db37b466cc14a4e7c32936b0ce.
Add the right file this time
Should do it
Break lists and include absolute pathing
Changelog
Apply fixes requested by Wild Bill
Merge pull request #1777 from dylanstrategie/Surgery

Re-introduce sex change surgery