espeak: create a phonemeset per en accent
espeak/en: extend the phonemeset coverage
espeak/en-GB-scotland: extend the phonemeset coverage
espeak/en-GB-x-lancastrian: extend the phonemeset coverage
espeak/en-GB-x-rp: extend the phonemeset coverage
espeak/en-GB-x-rp: don't use /a#/ for the LETTER and COMMA vowels
espeak/en-GB-x-westmids: extend the phonemeset coverage
espeak phonemesets: simplify pause phoneme handling
espeak/en-US: extend the phonemeset coverage
espeak/en-029: extend the phonemeset coverage