Patch by Samuel Thibault.

If a command ran to completion before the thread calling
fifo_add_command woke up, that thread would wait forever
for the command to start, never realizing that it had already
finished.

Moved include/espeak/speak_lib.h to include/espeak-ng/speak_lib.h and
created a symlink from the original location.

Added support for line-by-line input reading from unix FIFOs.

Allow to decrease the score in the rule by adding

Replace upercase O in ditc source

Added statements for unstressed vowels, change length/amplitude for unstressed vowels.

improved spanish prosody in tr_language.c

Added rule for suffix mente in es_rules

Translated language names

Added rules for letter spanish ce cedilla, see issue 130

Intonation: improved head and prehead in tune q6

This function should just discard the currently playing audio,
rather than close the audio device.  After all,
we will probably want to synthesize something else later.

Fixed length stressed vowels in tr_language.c (see #80).

Improved phonemes, new statements for [a] and long close [o].

Added last improvements in italian dict source tested on april-may 2016.

This can occur in cases where the voice is not found, or
espeak_ng_Initialize is called more than once.