Haketilo

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.

Revamp signatures and break header caching on FF

Signatures, instead of consisting of the secure salt followed by the unique
value generated from the URL, are now the unique value generated from the
policy value (which will follow them) succeeded by the URL....

Use URL-based policy smuggling

Increase the power of URL-based smuggling by making it (effectively)
compulsory in all cases and adapting a structure. While the details still need to be worked out, the
potential for future expansion is there.

Integrate browser.js into exports_init.js, and streamline the result

show some settings of the current page in the popup

move parsing of url with targets to misc.js

refactor 3 miscellaneous fnctionalities to a their single own file

emply an sh-based build system; make some changes to blocking

gather all copyright info in 'copyright' file

change licenses