Make public things that are needed for my Grace type-checker

[IsaacOscar]

I have added a few public modifiers to some classes.
This is the minimal set of changes I need for my grace type-checker.
See https://gitlab.ecs.vuw.ac.nz/isaac/GraceTC/tree/vanilla-kernan, specifically the following files:

• kernan-module/kernan-parser.csproj this is the hand-edit project file for my kernan module, which ensures the module is correctly linked with kernan and places the compiled dll in the appropriate place for kernan to find it.
• kernan-module/KernanParser.cs this is the source code for my module which relies on the changes in this pull request. It exposes a few methods to grace that I need for my type-checker.
• kernan-module/Callback.cs this provides a very simple and easy to use library for making Grace callbacks in C# code, it is a drasticly simpler version of kernans own Methods.cs file (which defines class like DelagateMethod1Ctx), I would suggest changed Methods.cs to something like my Callback.cs file as it will allow lots of reduction of code bloat, and allow for more easily exposing methods to grace.
• build-kernan.sh
  This is a script that will download and compile my modified kernan version and build my kernan module.

[IsaacOscar]

I'm closing this as I've decided to go a different route, see pull request #7 which replaces this request.