torchbear bindings module map

(related to #4)

functions and their arguments, eg:

- `module.set("to_camel_case", lua.createfunction(|, text: String| {...`
- `module.set("to_table", lua.create_function(|lua, text: String| {...`

these functions exist and they take strings named 'text'

- `module.set("match", lua.create_function(|_, (expr, val): (String, String)|`
- `module.set("replace_all", lua.create_function(|_, (expr, val, patt): (String, String, String)| {`

these have two and three arguments

Start with the module.set bindings listed in the issue and review related issue #4. Trace how these bindings are represented in the module map; done means the listed functions and their string arguments are captured consistently.

Scritto dal modello di indicizzazione a partire dal testo della issue.