Improve 301 redirect and 404 not found, implement env.status so the jst templates...

Improve 301 redirect and 404 not found, implement env.status so the jst templates do redirects etc, change console logging to reduce page serving delay and chatter based on build_cache.git commit b4e0eb9, js_template.git commit aedc57a, revise (read|write|modify)_json() interface based on json_cache.git commit 72f2352