v0.3.1

Added

• junior update updates Junior itself from npm first, then re-runs as the
  new version to update every managed binary, companion and skill;
  --no-self skips it and source checkouts are never touched.
• junior doctor --check-updates reports Junior's own version.
• junior update refreshes an installed managed TRIZ without --with-triz.

Fixed

• The managed TRIZ install keeps the release's package name and version, which
  TRIZ 0.3+ needs at import time (update --with-triz failed on v0.3.0).
• npm and npm-installed companion CLIs (.cmd shims) are spawned correctly on
  Windows.

Published as @matthew-cochran/junior@0.3.1 (#34).