envelope_dat.

envelope_dat and envelope_paths were only set but never used.
LoadEnvelope() and LoadEnvelope2() no longer need fname as an argument.

it: Updates italian source dictionaries

docs: Fixed the footnote for Japanese

Should be input in hiragana and katakana, not Arabic alphabet.

They are making the files non-ascii for no useful reason

Fixed the unnecessary errors in the arlistx file

first step twards fixing the arabic pronunciation

569e1e9a6a

Words containing "uia":
Algonquian
alleluia
colloquia
colloquial
colloquialism
equiangular
Guiana
reliquiae

Words containing "guid":
guidable
guidance
guide
guidebook
guided
guideline
guidepost
guider
guiders
honeyguide
languid
languidness
misguide
misguided
preguide
waveguide

This way we can compile multiple dictionaries at a time without
stepping on 'temp' file from different compilation steps:

    $ make -j8 -B
    ...
    make[1]: *** [Makefile:3082: espeak-ng-data/an_dict] Segmentation fault (core dumped)
    make[1]: *** Deleting file 'espeak-ng-data/an_dict'
    make[1]: *** [Makefile:3082: espeak-ng-data/az_dict] Segmentation fault (core dumped)
    make[1]: *** Deleting file 'espeak-ng-data/az_dict'

en: Fix several Microsoft-specific terms

Noticed build failure on NixOS when built package with 'make -j16':

    build flags: -j16 -l16 SHELL=bash
    Makefile:2844: warning: ignoring prerequisites on suffix rule definition
    make  all-am
    make[1]: Entering directory '/build/espeak-ng'
    Makefile:2844: warning: ignoring prerequisites on suffix rule definition
    touch dictsource/az_extra
    ...
    touch dictsource/yue_extra
    cd dictsource && ESPEAK_DATA_PATH=/build/espeak-ng LD_LIBRARY_PATH=../src: ../src/espeak-ng --compile=yue && cd ..
    bash: line 1: ../src/espeak-ng: No such file or directory
    make[1]: *** [Makefile:3546: espeak-ng-data/yue_dict] Error 127
    make[1]: Leaving directory '/build/espeak-ng'
    make: *** [Makefile:831: all] Error 2

The fix is to add dependency on 'espeak-ng' similar to other rules.

Fix pronunciation of given name Shaoni

This specifies that the es* mbrola voices are rather for Spanish
spanish.

The standard codename for United Kingdom for locales is UK.

- We want to use br* voices in priority for Brazilian Portugues, but not
  for general Portuguese.
- We want to use ca* and Belgian voices for Canadian and Belgian French,
  but rather not for general French.

It currently erroneously sets the fr5 voice.

Otherwise espeak_SetVoiceByName returns EE_OK even if the mbrola voice
file could not be loaded and thus setting the voice actually failed.

All other mbrola voices follow the "language-mbrola-number" name format.

This reverts commit 02783150cd.

This reverts commit aa765c7680.

Avoid converting input data to Float32Array

It is perhaps more autoconfy to have AM_CONDITIONAL evaluate a variable
rather than call it with what are essentially constants representing
either true or false. It might be even more autoconfy to use
AC_CHECK_PROG here instead; I don't know if there's a good reason why
that wasn't already done here.

Previously, if configure determined that gradle could not be found, the
summary at the end of the configure output would nevertheless print the
name or path of the nonexistent gradle executable that it tried to find.
Now it clears that variable.