* NEW [POCKETVOX] improving controller, module and notifier

  - Adding execute virtual function in PocketvoxModule should be overwritted before using
  - Directly call execute function from controller
  - Adding support for espeak lib in configure.ac and notifier
  * modifying the notifier.c to add multiplateform sound notification
Merge branch 'master' of https://github.com/benoitfragit/pocketVox