112.01.00

- Don't show noisy `glob..changed` messages except with `-show-glob-changed` flag.
- Support shared build rules via `${jenga}/share`.
- Detect cycle in dep scheme instead of hanging.
- Made standalone actions atomic, just like actions associated with
  target files.

  Running actions and recording the result in the persistent
  `.jenga.db` should be performed atomically for standalone actions,
  as it is for actions which are associated with target files