Handle bgee_user_dir differently on Linux

Return the game dir instead of failing. It won't work for anyone
running BGEE on Linux, but in the interim it will work for me.
Fix a regression in Tpwork

This really isn't as stupid as it looks
Futz around with the readme

Typewriter typeface on syntax and adding references
Consolidate the setting of TP2 vars
More readme stuff

More typewriter typeface for syntax
Move (ludicrously outdated) todo file outside version control