Allow specifying root namespace
Merge pull request #145 from Facepunch/root-namespace
Allow specifying root namespace in the .addon file
```
{
"sharedassets": "*.*",
"type": "game",
"ident": "ognik.spectest",
"rootnamespace": "Poop"
}
```
https://files.facepunch.com/ognik/1b0811b1/2022-01-18_36-07-333a9692-b006-45ae-9291-ba9d4a2e701b-EM3ZWSxJ.png