Update Documentation

[kdubb]

• References to Kotlin files and other incorrect terminology need to be updated or removed.
• All classes need have at least basic documentation.
• README should have more/better examples of Swift generation.

[emrepun]

Are you planning to work on this any time soon? @kdubb It would be great to have the last bullet point at least in the README.

[kdubb]

I wish I had time to build a nice overview or something similar to KotlinPoet's docs over at Square. Unfortunately, I don't see it happening any time soon. But, KotlinPoet and SwiftPoet are very similar so that documentation might be helpful.

[emrepun]

Alright, thanks for your response