code cleanup: new file langopts.c for handling language options.
The switch case in LoadVoice() currently mixes voice and language
options. This change will start separating them into two functions.
CheckTranslator will be moved to langopts.c. In the future there should
be no need to use it in voices.c. There will be other temporary
solutions also.
code cleanup: start moving translateWord3() to a new source file.
The file will be organized to have one callable function only. This
should make code structure simpler.
Existing code will be changed to use function parameters instead of
global variables.
Possible problems include too much dependencies with numbers.c.
Soundicons are used for external audio with SSML <audio> tag and for
replacing punctuation names with sound files in LoadConfig().
Currently there's a bug wih soundicon slots: if both LoadConfig and
<audio> are used, the punctuation reserves all slots and no sound from
<audio> is played.