Haketilo

adapt to changes in file path format

From now on we assume Hydrilla serves file contents at 'file/sha256/' instead of 'file/sha256-'.
With this commit we also stop using the "hash_key" property internally.

make Haketilo buildable again (for Mozilla)

How cool it is to throw away 5755 lines of code...

facilitate querying IndexedDB for script files of resource and its dependencies

add new root content script

add a mapping/resources installation dialog

facilitate caching repository responses in content scripts

facilitate making CORS-agnostic requests through background script

make blocking rules queryable in pattern tree just as mappings are

fix license promise typo

improve and test the dafult policy dialog

This commit also fixes some bugs that manifested themselves spuriously.