Bumped version number in Molt Book overview.

Merge pull request #92 from wduquette/molt-err

Exception Handling and Return Protocol

Bumped to 0.2.2.

Subcommand dispatch (#63)

This pull request adds the Interp::call_subcommand method, and updates the info and array commands to use it. It also completes the interp.rs doc comment scrub.

cargo fmt

Added publication metadata to Cargo.toml.

Update Cargo.toml

Added package README's.