TODO

- content "kind": text, html, uri, js (code), js (str chars), html attributes
- Contextual autoescape
- js: figure out / unify print directives / funcs
- js: implement / test all functions
- js: command line tool to compile
- js: combine nodes into expressions for output when possible
- js: generate goog.provide/goog.require
- js: generate jsdoc
- js: goog.getCssName
- {msg}
- Delegates (delpackage, delcall, deltemplate)
- parsepasses (optimizations) (Simplify, CombineConsecutiveRawText, Prerender)
- CSS renaming
- Go code generation
- Bidi
- use xliff message bundles
- use PO messages
- Message extractor (placeholders/phname)
- "private" templates (and optimizations)
- Caching