Haketilo

treat "view-source:" pages as privileged

prepend all generated console messages with 'Haketilo:'

optimize Pattern Query Tree for size of its JSON.stringify()'ed representation

validate repository responses against JSON schemas

• compute_scripts.awk (include_file): don't enforce specific path format on #INCLUDE'd files
• .gitmodules, schemas: add Haketilo JSON schemas subrepo
• html/install.js (InstallView): import schema validator and run it against downloaded mapping and resource definitions...

change copyright notice of js-sha256 code to be exactly the same as in upstream's LICENSE.txt

• common/sha256.js: removed email address from the copyright line

assume and use "$schema" properties in item definitions

fix loading initial data and verify it in automated tests

change store names and data keys to singular

restore chromium support

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.