Add ng API to enable phoneme events

src/include/espeak-ng/espeak_ng.h

                        int value,
                        int relative);
 
+ESPEAK_NG_API espeak_ng_STATUS
+espeak_ng_SetPhonemeEvents(int enable, int ipa);
+
 ESPEAK_NG_API espeak_ng_STATUS
 espeak_ng_SetPunctuationList(const wchar_t *punctlist);
 

src/libespeak-ng/speech.c

 	return ENS_OK;
 }
 
+ESPEAK_NG_API espeak_ng_STATUS espeak_ng_SetPhonemeEvents(int enable, int ipa) {
+	option_phoneme_events = 0;
+	if (enable) {
+		option_phoneme_events |= espeakINITIALIZE_PHONEME_EVENTS;
+		if (ipa) {
+			option_phoneme_events |= espeakINITIALIZE_PHONEME_IPA;
+		}
+	}
+	return ENS_OK;
+}
+
 ESPEAK_NG_API int espeak_ng_GetSampleRate(void)
 {
 	return samplerate;