Implement system `sac-zho-hani-latn-1979` (Chinese Hanyu Pinyin 1979 System

[ronaldtse]

This issue is to implement the transliteration system of sac-zho-hani-latn-1979.

This system is referred in the GeoNames database as zho_Hani2Latn_GCH_1979, with the system title 'Chinese Hanyu Pinyin 1979 System'.

Tests should rely on the data extracted for the zho_Hani2Latn_GCH_1979 system in https://github.com/riboseinc/geonames-transliteration-data .

[ronaldtse]

This is the stock SAC Pinyin system, defined by the combination of these references:

• GB/T 16159-2012, Basic rules of the Chinese phonetic alphabet orthography, Standardization Administration of China, 2012

• GB/T 15834-2011, General rules for punctuation, Standardization Administration of China, 2011

• GB/T 28039-2011, Chinese Pinyin Spelling Rules for Chinese Personal Names, Standardization Administration of China, 2011

• Scheme for the Chinese Phonetic Alphabet, 5th National People's Congress of China, 1958

• The Chinese Phonetic Alphabet Spelling Rules for Chinese Geographical Names (Han-Chinese Geographical Names), published jointly by the China Committee on Geographical Names, China Committee on Writing System Reform, State Bureau of Surveying and Mapping, 1984