initial support for Bing TTS
improved handling of corrupt files
improve audio
cache original files from Bing
corrections based on mod_say_de source code
http://git.freeswitch.org/git/freeswitch/tree/src/mod/say/mod_say_de/mod_say_de.c
remove dot
more improvements
conference update
update voicemail
IVR improvements
IVR updates
Merge branch 'develop'