V0.3.1

Update doc
Replace dir() to get()
Adopt Path from pathlib

v0.2.2

1. Add tests
2. Add attribute name convertor
3. Add new features including set_shortcut()
4. Change shortcuts to sc in PathNavigator

Full Changelog: v0.1.1...v0.2.2

v0.1.1

The first release of PathNavigator.