gnome-speech 0.4.22:
* drivers/swift/swiftsynthesisdriver.c: fix for bug #559583 - Swift
synthesis driver causes Python client to get "TypeError: could not
demarshal return value" on call to getAllVoices.
gnome-speech 0.4.21:
* drivers/espeak/espeaksynthesisdriver.c: fix for bug #545896 - eSpeak
segmentation fault.
gnome-speech 0.4.20:
* drivers/espeak/*: fix for bug 535493 - eSpeak driver can
block. The fix adds a list mechanism to handle utterances
to be spoken and then processes them on the gidle thread.
Also raised the maximum speech rate for eSpeak.
* configure.in: be smarter about automatically finding espeak
* drivers/espeak/Makefile.am: remove libstdc++. It is not needed
and makes the Solaris build fail.
