Added bottom padding to all bootstrap themes
Fix rendering of tables in the Read The Docs theme

For the Read The Docs theme to render tables correctly it expects them
to have the docutils class (which is present in Sphinx projects).

Fixes #106
Merge pull request #257 from d0ugal/rtd-table

Fix rendering of tables in the Read The Docs theme
Merge pull request #255 from DannyBen/css-padding

Added bottom padding to all bootstrap themes