Webwidgets

This new version of WebWidgets adds support for custom CSS rule names and introduces a proper string representation of WebWidgets objects.


What's Changed
* Enabled custom CSS rule names by mlaasri in https://github.com/mlaasri/WebWidgets/pull/18


**Full Changelog**: https://github.com/mlaasri/WebWidgets/compare/0.2.0...0.2.1

This new version of WebWidgets adds support for CSS.

Individual nodes can be assigned a style in the form of CSS properties, and a new compilation engine can turn these styles into proper, unified CSS code.

What's Changed
* Implemented base code for HTML tags in https://github.com/mlaasri/WebWidgets/pull/9
* Made minor fixes in sanitizing module and tests in https://github.com/mlaasri/WebWidgets/pull/10
* Implemented CSS compilation in https://github.com/mlaasri/WebWidgets/pull/11
* Implemented HTMLNode copy method in https://github.com/mlaasri/WebWidgets/pull/12
* Made minor fix in documentation and added comments in https://github.com/mlaasri/WebWidgets/pull/13
* Improved CSS module in https://github.com/mlaasri/WebWidgets/pull/14
* Implemented apply_css function in https://github.com/mlaasri/WebWidgets/pull/15
* Implemented validation module in https://github.com/mlaasri/WebWidgets/pull/16
* Implemented to_css in https://github.com/mlaasri/WebWidgets/pull/17


**Full Changelog**: https://github.com/mlaasri/WebWidgets/compare/0.1.0...0.2.0

First version of WebWidgets, featuring an engine to generate HTML code from simple Python objects.