[x] Filter away warnings out of my control for docutils and breathe.
[x] Add tests that trigger warnings for app.{info,warn,add_stylesheet,add_javascript}
[x] Destroy deprecation warnings (for now, until you add a test that builds a certain troublesome test project... ..... ...... and you hit certain directives. but the checkmark is green, so everything is ok)
docutilsandbreathe.app.{info,warn,add_stylesheet,add_javascript}