Refined Soundex and Jaro

[DonaldTsang]

These could be directly ported into Jellyfish as these are C files

• [ ] Refined Soundex Refined soundex source: https://github.com/Rostepher/libstrcmp/blob/master/src/phonetic/refined_soundex.c
  Original soundex source: https://github.com/Rostepher/libstrcmp/blob/master/src/phonetic/soundex.c
  Comparing with CJellyfish: https://github.com/jamesturk/cjellyfish/blob/master/soundex.c

• [ ] Original Jaro Jaro and Jaro-Winker source: https://github.com/Rostepher/libstrcmp/blob/master/src/distance/jaro_winkler.c Comparing to CJellyfish: https://github.com/jamesturk/cjellyfish/blob/master/jaro.c

• [ ] Basic SIFT SIFT original (no CJellyfish reference): https://github.com/jhermsmeier/sift.c JS example: https://github.com/timoxley/sift

[jamesturk]

i'm open to PRs if there's a need to, but I don't think there's a clear reason to switch to any of these implementations- at least jaro is almost identical to what we started w/