Add README.md
 Merge branch 'develop' into 'master'

Add README.md

As title, added README.md.
Change the directory to examples refs #430: Tidy up the code
CamelCase to snake_case refs #430: Tidy up the code
Add type hinting refs #430: Tidy up the code
Add PHPDoc refs #430: Tidy up the code
Add INSTALLATION section refs #430: Tidy up the code
Merge branch 'feature/tidy-up-code' into develop refs #430: Tidy up the code
Merge branch 'develop' into 'master'

To release

Including the following changes:

* Add PHPDoc
* CamelCase to snake_case
* Set type hinting
* Change default values
* Tidy up README.md
Bump up the version refs #430: Tidy up the code
Add CHANGELOG.md refs #430: Tidy up the code
Merge branch 'release/v0.1.0' into 'master'

Release/v0.1.0

Release 0.1.0