Add a configuration variable (PhonosStoreFilesAsMp3, default true) to optionally disable WAV --> MP3 conversion for the Larynx and eSpeak engines — some systems may be unable to use LAME (?) (and it makes it a little easier to test on Windows!)
Acceptance criteria
- With $wgPhonosStoreFilesAsMp3 unset, the generated audio from Phonos should be a MP3 file
- With $wgPhonosStoreFilesAsMp3 = true; in LocalSettings.php, the generated audio from Phonos should be a MP3 file
- With $wgPhonosStoreFilesAsMp3 = false; in LocalSettings.php, the generated audio from Phonos should be a WAV file