This is pretty pointless, but I just accidentally discovered how to link to local files in markdown:
Look [back two directories, to the General Discussions page]. [back two directories, to the General Discussions page]:../../
Check out the [Forum]! [Forum]:../../../ "This title shows up on hover."
Check out the Forum!
Check out the [Quest Forum]! [Quest Forum]:../../../quest "This may or may not work."
Check out the Quest Forum!
What the [email protected]#$!
Ha! Nice link title!
>What the [email protected]#$! Ha! Nice [link title](http://textadventures.co.uk/forum/general/topic/t6stqpsxlek7y4g20dq8uq/linking-to-local-files-with-markdown-an-accidental-discovery#402e2408-74db-4abb-a145-b2c294add389 "This will take you directly to Dcoder's post.")!```