Instructions for iOS

[AlexCheema]

• A lot of people have asked how to get exo running on iOS
• Now that things are a lot more stable, we should have parity with iOS soon
• Once we have that, create docs on how to run on iOS

[Trevato]

@AlexCheema, I could help document the build process. I sent an email regarding access to the iOS GitHub repo.

[spprichard]

@AlexCheema I'd like to help out on this if possible

[Cloud1590]

@AlexCheema - I also am interested in helping out with the iOS development