DOC: closes gh6838. Breakout options.rst from basics.rst

closes #6838. 
closes #3104 
Breakout "options" section for docs, heavily using info already in ``basics.rst``. Expands examples, and turns ``describe_options`` into a table.
I wouldn't give this example (as it was now). I would give an example where you provide eg `columns` giving `max_columns` and  `max_info_columns` (or something else). 
The thing is, this takes a lot of space, and it is much better presented in the table below (better organized layout).