Refactor API.

Refactor API.

Refactor host code to compile synchronously, return both sync and async functions, merge trace logging function into wasm env, refactor worker listening process, add type checks to worker message parsing, and emit type definitions.
Update testing page to add NanoNaCl to global context in test page to enable testing ad hoc commands, add tests for sync functions using byte arrays, add pause when starting each test run to allow DOM to repaint status text, and always run self-check.
Rename main assembly file.
Improve documentation and reorganize functions.
Update dependencies.