Stop using 'mapping' terminology for config files.
Re-word getting started with compiling instructions.
Unhide TOC in index to fix sidebar.
Add output format examples to read-only configuration docs.
Add output examples to raw configuration documentation.
Clarify that output format examples only apply if JSON output enabled.
Add output examples to all config docs.
Remove mention of building CanSignal struct manually.
Use restructured text's definition lists in config reference docs.
Use definition list for makefile options.