HCE phonemic transcription for Australian English

We added the support for HCE phonemic transcription system for Australian English in our English phonetic translator.

Up until now we only had the support for Mitchell/Delbridge (MD) system which is pretty old, but is still frequently used in Australian English dictionaries, for example, Macquarie dictionary.

Harrington/Cox/Evans (HCE) was introduced not so long ago and represents much more accurately how the vowels are pronounced in Australian English.