Version 0.5.0

adds decades and centuries,  more precise calculation, bumps to v0.5.0

Version 0.4.0

shortens class names, implements new format*-methods, refactors, unit…

…s got shortened

Version 0.3.0

adds new long extensions to format long in human readable string

Version 0.2.1

v0.2.1

Update README.md

Version 0.2.0

v0.2.0

Merge branch 'develop'