This ports the PDF manual by @catloversg into .md form, so it can be used in-game and via browsing on GitHub.
It also adds MathJax rendering to in-game docs, so that the math formulas can be rendered. (GitHub already supports this natively.)
API Changes:
Adds ns.gang.getRecruitsAvailable: Gets the number of additional gang members that can currently be recruited
Adds ns.gang.respectForNextRecruit: Gets the respect threshold for recruiting the next gang member
Adds ns.gang.renameMember: Renames a gang member
Plus many doc and ui improvements