CoffeeScript -> TypeScript

[glebm]

Rewrites the CoffeeScript implementation in TypeScript. The TypeScript source code is linted and auto-formatted on build.

Also makes the following changes / fixes to the parser:

• Improves performance by avoiding switching on strings.
• Splits the giant move method into smaller methods.
• Renames some internal types for clarity.
• Flattens the redundant MachineState (always intermediate until final) into MachineAction.
• Adds the ability to start parsing from any non-terminal. Fixes #73
• Hides the internal match method. Fixes #72
• Simplifies the representation for EmptyAST, removing the from field. Fixes #70
• Fixes an off-by-one in column reporting for error positions after the first line.

Fixes #77

The most important file in this PR is waxeye.ts.

Demo: https://glebm.github.io/waxeye/demo.html

[orlandohill]

Looks great! Let me know, when it's ready to be merged.

[glebm]

@orlandohill Rebased, good to merge!

[orlandohill]

Great, thanks!