feature(formatting/tags): Include html tags

- Tags have only safe attributes
- Exclude <noscript> tag from content
- Remove unused code

Closes #3
feature(formatting/tags): Test bbc article with tags
feature(formatting/tags): Make tests pending to fix later with proper tests
feature(formatting/tags): Update readme to have content_html method
feature(formatting/tags): Fix publish date tests
feature(formatting/tags): Fix bbc test
Merge pull request #8 from cronycle/feature/3-include-html-tags

feature(formatting/tags): Include html tags