v0.14.0: Alpha release #5

This release contains bug fixes and a new feature.

Changes:

• "stop-command" service parameter can now be applied to process and bgprocess services. If
  specified for these service types, the specified command is used to stop the service.

• "dinitctl status" now reports launch stage and error for services which failed to execute.
  Example output:

  $ src/dinitctl status mpd
  Service: mpd
      State: STOPPED (could not be launched)
          Stage: executing command
          Error: No such file or directory
  

• Fixes bug where "dinitctl status" command would sometimes report an error.

• Fixes a (situational, unlikely) bug where a bgprocess state could get stuck.

• Fixes a potential memory corruption / crash bug occurring in out-of-memory situations when
  adding a dependency to a service (via "dinitctl reload" or "dinitctl add-dep").