Haketilo

restore compatibility with IceCat 60

This commit also fixes the --driver option to configure script.

allow eval() in injected scripts

support schema v2 and dependencies on mappings

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...