Add "all caps" case

Apply UTM injection only to http(s) links

Other URI schemes should not care much about UTM parameters, so can be excluded

Add back forgotten gettext setup

Increase cssutils logging level to ERROR

Fix view in browser action

* Previously injected twince into the TXT version
* Not aligned right no Gmail iOS

Apply review suggestions

Fix #54 -- Reset existing payloads only (#55)

Extend the documentation

Allow links from the same top-level domain

Handle no netloc case