separate suffix from stem and add support to the library in the app

libjpconj:
- Separate the conjugation  stem|suffix|adding 
- Beautify inflection.cpp code by eliminating "else"

jpconj:
- Add katsuyou function for basic form
- Add initialization function to libjpconjlink.cpp, this function search for the library one time (when the application start, we can call it)