first version, loading some data from outside the app
Now truly using systemXHR
Load a definition from Wiktionary instead of a cat picture
display some 'searching' text while loading
Using MDN search api for demonstrating
use placeholder
better font size
Make it look a little bit nicer
prevent double submissions
cancel existing search if request hasn't finished yet
sensible error reporting + some refactoring for better readability
note about CSP + inline script not allowed
Add basic localisation
Fix manifest
just in case the request does not contain the error property, as if that was the most important of the problems in that case, right?
remove things that do not apply to this template, and link to permissions and stuff
markdown fail
better walkthrough
Rename icon names
Remove locale from MDN URLs (fix #4)

Includes changing the `apiUrl` to use a non-en-US URL so it
should search in the user's language!