Removal of OnFastChooseListener

[KlutzyBubbles]

Don't see the point in it, i created a fork located https://github.com/KlutzyBubbles/colorpicker/tree/master/colorpicker-library/src/main/java/petrov/kristiyan/colorpicker which contains the changes to remove the interface.

Reasoning: i was developing with the library and found that

1. the method within the interface was incorrectly named (setOnFastChangeListener instead of onFastChange)
2. It was extremely frustrating when creating similar code to have to rename the method and the interface for the exact same code (for setting color variables)

An option IF you really dont want to remove the OnFastChangeListener is to make it the same method names as both interfaces were made to provide the same data for the same output just via a different path.

Wanted to create an issue for this before i make a pull request.

[kristiyanP]

I would gladly accept a pull request with a refactor for the method name as i think the method is fairly necessary.

[mustafamn]

i m getting an extra 2 row while i did not apply the color..???