ElasticSearch phonetic search plugin for Nyingarn

Algorithm description: (not comprehensive)

1. replace unicode diacritics with ASCII versions
2. remove macron from vowels
3. replace diphthong combinations with -y-/-w-and initial i/u->yi/wu
4. -ow/-aw -> AWU
5. ah er uh ar -> A
6. EN/EL -> IN/IL
7. long vowel -> short vowel
8. UA/UI/OA -> UWA/UWI
9. remove double letters (except for rr)
10. enye -> NG
11. YNY/YLY/YN/YL -> NY/LY
12. double digraphs -> single digraph (e.g., NGNG -> NG)
13. final Y -> AYI
14. initial G -> K
15. single letter replacements i. B -> P ii. D -> T iii. O -> U iv. E -> I
16. G -> K (except for NG)
17. di- and tri-graphs -> J
18. S -> J
19. C -> K, WH -> W
20. WU -> U (except initially or after A I or U)
21. WA/WI/WU -> AWA/AWI/AWU (except initially or after AIU)
22. RA/RI/RU -> URA/URI/URU (except initially or after AIUR)
23. Y -> AYI (except next to AIU, or after N or L)
24. AY -> AYI (except before AIU)
25. Y -> I (except after AIUNLT)
26. remove special characters and digits