* Most file types prefer 2-space indents, so now default
to that and list the exceptions
* Add max_line_length=120 for .py files (Django convention)
* Bat files require CRLF
* Add vertical space between items in "open" lists
(rtfd/sphinx_rtd_theme#590)
* Distinguish shell prompts in console examples,
and omit them if the code is copied
* Add css and js extras directly from Sphinx conf.py
(no need to override template)
