fetcher: fixed rule updating
Merge pull request #79 from nikicat/master

fetcher: fixed rule updating
Removed bltins
Removed _dict suffix
Implemented env.patch_config(): Append plugins configuration
Using gns.patch_config()
env.setup_config(): copy config
Added rules-base as submodule
Added import hook
Read-only submodule URL
Removed old submodule
Added submodule with Read-only URL
Updated dependencies: raava >= 0.4