feat(full_widget_generation): Generate all the required file for a widget in a dedicated directory (#6)

* New WebComponentCopier CLI

Covers [UID-441](https://bonitasoft.atlassian.net/browse/UID-441)

* - Removed UID tags
- Enhanced CLI
- Support of properties file generation from WC name

* Property and PropertiesInfo now use the Builder pattern

* Fixed + added tests

* Generate AngularJS (UID editor) and Angular (runtime) HTML templates

* Custom Widget Builder : first step to generate properties json file