Haketilo

Fix some bugs in the refined CSP handling

add ability to query page content from repo and display it in the popup

store repository URLs in settings

Merge remote-tracking branch 'origin/koszko' into jahoti

Remove unnecessary imports of url_item and add a CSP header-parsing function

The parsing function isn't used yet; however, it will eventually be as a less
destructive alternative to handling headers as indivisible units.

Merge rebranding to "Hachette"

fix page info server bugs

Merge commit 'ecb787046271de708b94da70240713e725299d86'

Refer to the extension consistently as "Hachette" and remove TODOS.org
from the copyright file

Streamline and harden unique values/settings

The base URL is now included in the settings. The unique value no longer uses
it directly, as it is included by virtue of the settings; however, the number
of full hours since the epoch (UTC) is now incorporated.