Documentation for Binding module functions

[LyndonGingerich]

The Binding module contains many functions undocumented in the tutorial. Particularly, the tutorial says, "Note: Lazy bindings may get a complete overhaul soon; see #143," which issue is closed, but Binding.addLazy is still not documented. Where should such documentation be added?

The tutorial, I think, has somewhat outgrown its name and become a reference of sorts. Should we extract a reference and document the Binding functions there?

• Split REFERENCE.md from TUTORIAL.md #521
• Add subsection "Modifying bindings" to REFERENCE #525
• Update lazy binding documentation #528
• Document other Bindings functions

[TysonMN]

The tutorial mostly predates the binding module.

You can do whatever you think is best with the documentation.

[LyndonGingerich]

I'm delaying until the static bindings are implemented. I think we could probably generate documentation from the function XML comments.

[marner2]

@LyndonGingerich You don't need to delay anymore.