mod_voicemail: Add new vm_fsdb_pref_greeting_get
mod_voicemail_ivr: Added the new param for API vm_fsdb_pref_greeting_get WARNING, you must add it to the config or else module will complain of missing value... With the new API, it will now playback the greeting when setting it.  Will need to figure out a better way to deal with api being added in the future...  Add support to auto start new message playback and made it default in the config file.
mod_voicemail_ivr phrases : make value = 0 as plural (0 messages).  Don't tell the option for new message if no new message present.  Changes a few default key to match more closely mod_voicemail key settings.