Add initial support for Pyash languagege, more info:

* https://www.academia.edu/34133204/Pyash_One_Language_to_Unite_Them_All
* https://gitlab.com/liberit/pyac

as phoneme set for both is the same, rename phoneme translation file to in

There are small differences between diphone set of the voices, but they are not used from espeak-ng

There are small differences for diphone sets, but these are not used
from eSpeak NG.

Using make check builds but does not install them.

Using make check builds but does not install them.

Closes #396.

https://github.com/espeak-ng/espeak-ng/issues/407

There is no fr-CA language dialect dialect file, nor has there
been in the espeak/espeak-ng history.

The fr-CA phoneme table defined the additional phonemes [U], [y"],
[E:], and [A]. The fr-FR phoneme table mapped these to [u], [y],
[E], and [a] respectively. This meant to describe the phonemes that
have not been merged in fr-CA, but have merged in fr-FR, as described
in https://en.wikipedia.org/wiki/Quebec_French_phonology.

The only use of these phonemes in the French dictionary was with
the word "tramway" using [E:]. This has been replaced with [E] to
match the rest of the dictionary file transcriptions, and those
phonemes for fr-CA have been removed.

If fr-CA is supported in the future, the French dictionary would
need to be modified to reverse the merger of the phonemes that are
not merged in fr-CA, with the merge logic being performed in the
fr-FR phoneme table like in the code being removed in this commit.

move: attrcmp() and attrlookup()
new file ssml.c added to Makefile.am

A corpus of SSML input files will also be needed for fuzzing.
https://github.com/espeak-ng/espeak-ng/issues/407