Documentation expansion

[benzen]

After: #96

I think we still missing a link to this api from htmlflow web site.

Also the javadoc for htmlFlow itself woul be a great addition, with a link on htmlflow website.
In my opinion theses docs deserver a section of there own on the website.

[fmcarvalho]

Hi @benzen

Both URLs are available: https://javadoc.io/doc/com.github.xmlet/htmlflow/latest/index.html and https://javadoc.io/doc/com.github.xmlet/htmlApiFaster/latest/index.html

You may purpose where htmlflow website should include those links.

[fmcarvalho]

Both links are available at this repo's README and that's enough