Use class instead of bean.

A class should only be called 'bean', if:

* all properties are private (use getters/setters)
* it implements the Serializable interface
* it has a public default constructor

See: http://stackoverflow.com/questions/3295496/what-is-a-javabean-exactly

Fix whitespace in Default Interface Methods

BiConsumer Example

just a tiny grammar thing

Readme Typo Fix

Fixed spelling

Fix typos and improve simple grammatical stuff

Fix typo in README.md

Ignore bin folder