Static API

[zonuexe]

refs #25

I understand that instance is useful for SoC.
But other implements (including Java) do not provided API for classifier instance.
I think it is not to bring confusion to the user be provide static and dynamic API.
What do you think? @tagomoris

@yuya-takeyama written #25 (comment):

Doesn't it cause any issue to call static methods in object context?

No problem. fb5b2e6 can revert.

[yuya-takeyama]

I can understand your point (consistency between languages).
But IMO, it's not a matter.
Implementations should follow its languages's manner.

However, I can also understand the benefit of static method for its handiness to call.

My concerns are below.

• Doesn't it cause any issue to call static methods in object context?
  • As @zonuexe says, it seems to have no problem for now.
• It won't be changed in the future?
  • Calling a method in both way (statically and dynamically) seems bad manners to me.
  • In PHP, this kind of things are sometimes changed. (For example, calling non-static methods statically)
  • It leads me to unnecessary worry.

@woothee/woothee-php-team Any thoughts?