Dediserver guide for mod creators

[dpw13]

• what VS targets to build for to have dedi support
• how to list your mod as having dedisupport on SMR (but I think this should happen automatically based on what build targets you uploaded?)
• how to build just shipping/dev editor for your own testing so you don't recompile dediserver every single time you build a test version and don't need it
• an explanation of how dediservers differs from regular multiplayer (stuff like "everyone playing is a client" and "really important to make sure you get your multiplayer code working right, because if it 'just works for the host' that means it won't work for anyone in mp")

[dpw13]

Item 2 - yes, this will happen automatically if you upload the proper build targets.

[porisius]

See #164, not sure if I got all the bases covered.... so leaving as draft