direvent-5.4-bp160.1.12

- direvent 5.4:
  * Support simultaneous execution limits
  * Restore the nowait default
  * Fix bug in generic to system event translation
  * Fix sentinel code

- direvent 5.3:
  * Introduce compound events
  * New configuration statement for manipulating the environment
  * Variable expansion in arguments to some configuration statements
  * Rewrite the recursive watching support
  * Change interface for bulk closing of file descriptors

- Use noun phrase in summary.

- direvent 5.2, initial package