REFACTOR: harden esp-input.js for empty scope
FIX: esp.js for angular

- Check session based login with an auth check
- Add Esp.feedback, Esp.go.
FEATURE: Add httpRemoveParam API
FIX: ESP package.json:redirect.

Support redirect: “secure”.
REFACTOR: Update ejs.bit to support src/*/paks as paks directory.
REFACTOR: Cleanup and harden for null args.
REFACTOR: LICENSE.md