New demo content, sass fixes for inline code, autodoc code. Styling for code.

As it currently stands, all inline expressions in the theme show red links with boxes (because of extending ``code``). In addition, css rules for code styles were incorrect in their current form.

The styling in here is far easier on the eyes, it articulates 1.) more accurate css rules for how to touch code in the sphinx output 2.) creates more doc examples for visual test cases.

My intention for this is to be merged and then it can be tweaked further by others since there are new tests and clearer sass rules.

Further specifics can be seen by reading my diff.