Modify xtrn-setup to support third-party doors
Create a new dir in xtrn to hold ini files (install), which will be contributed to the repo
In the inis have the filename to look for, and md5 hashes
When setup runs, it will check all those inis to see if it can match with any dirs in the xtrn dir using the filename and hash
exe['game'].md5['xxx'].ini = path/to/ini // mapping
If so, it will use that ini file to install the game