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.
But maybe more in general: this section should maybe be merged with the frequently used options, as almost all options listed there are about console output formatting. It's a bit strange then to also have a section with that title, but with different content.