Follow Microsofts Guidelines about Config files / Install locations

[unlogisch04]

As in #31 the installer has some Problems.

As i did read some guidlines (im no expert) we should change some stuff:

• Config File should be written in %appdata%\SlimeVR\ -> Uninstall might leave this existing (wanted or not, is there a way to have a question to remove the config in uninstall)
• Server should register itself in SteamVR not the Installer (need help on that. Also a problem how and when to unregister ifself when you uninstall the app <- this needs discussion or a good solution how todo that correctly.

Installer should change the following:

• Installer: Migration, how to keep track?
• Installer: Do not Grant every user access to the SlimeVR programm directory (needs testing, Serial might be a problem?)
• Installer: When run with local rights install as app in user dir? ( There should be a location )

[ImUrX]

I think the SteamVR driver should be registered by the launcher, there is some example code in ALVR if interested