Garry's Mod support

[mgsmeris]

Hello, i saw that if someone'd like support for an additional game, they could open an issue. I'd love to use garry's mod demos with this tool, mainly the position(s) of players, their active weapon and entities. I edited a garry's mod demo
demo protocol: 3
network protocol: 24

changing the demo header from GMODEMO to HL2DEMO allows UntitledParser to parse alot of information. Exporting it to a log predicts it to be PORTAL_1_1910503, however all garry's mod demo eventaully fail with the error: '
More data remaining, parsing failed...'

Here is a list of common errors while trying to parse:

https://pastebin.com/8WMF23kf