Fixed css in reveal template and move static_html css to full_html template

As the title says, I have fixed some css styling in reveal to accommodate to the new css styling in the current dev ipython.
I have also modified CSS class inside transformers.py to move the static_html css to the full_html.tpl, because this css is specific for this template (i.e, i do not want to use it in reveal template).

Cheers.

Damián.