* Add a helper for writing inline multi-syntax examples
This will be useful for #205.
* Add the ability to add CSS output to the syntax switcher
* Automatically generate CSS for the syntax switcher by default
* Fix most lints
* Fix a specificity bug
* Show SCSS syntax by default
* Fix a couple more lints
* Make the example helper template-engine-agnostic
* Support a "syntax switcher" with a single syntax
This will make it possible to do nice-looking single-syntax code
examples in the reference.
* Remove trailing whitespace
