Autogenerated documentation

The code is already quite well documented, it would be really useful if you would generate some docs using Sphinx and add them to https://readthedocs.org/ :)

For an initial setup, this would probably already give useful docs:
```
sphinx-apidoc -o docs --full -H easyium -A KarlGong -V 1.3.6 -R 1.3.6 easyium
```