Feature release of pgagroal.
Features
- #13 User vault
 - #14 Trust security module
 - #15 Password security module
 - #16 MD5 security module
 - #32 man pages
 - #33 CLI: isalive
 - #34 Prefill support
 - #35 Move default path to /etc/pgagroal
 
Various improvements and bug fixes.










