Noun inflector has a limited interest as a noun can be either singular or plural in Japanese, depending on the context. However, some words are clearly plural forms. These forms are addressed here. As usual it is fully tested.
This pull request also contains:
Add a noun inflector for Japanese
More complete regexp to match Katakana
More complete regexp for Japanese characters
Iterate over an array is faster with for loops
Pretty sure it is useless, but caching array size
Merge branch 'master' of https://github.com/NaturalNode/natural into …