[!!!] Streamline all configuration options

changed
    [airbrake]
    enable =
    environment =
    host =
    resource =
to
    [phpframework]
    airbrake.enable =
    airbrake.environment =
    airbrake.host =
    airbrake.resource =

changed
    [application]
    cookie.encrypt_key =
    cookie.name =
    session.class =
to
    [phpframework]
    authentication.cookie.name =
    authentication.cookie.encrypt_key =
    authentication.sessionclass =

changed
    [application]
    migration_directory =
to
    [phpframwork]
    db.migrator.directory =

changed
    [cache]
    enable =
    cache_folder =
    full_output_cache =
    full_output_expiration =
    twig_cache_folder =
to
    [phpframework]
    cache.enable =
    cache.folder =
    cache.full_output =
    cache.full_output_expiration =
    cache.twig_folder =

changed
    [db]
    charset =
    enable_migrator =
    mysql.database =
    mysql.host =
    mysql.password =
    mysql.user =
to
    [phpframework]
    db.charset =
    db.migrator.enable =
    db.mysql.database =
    db.mysql.host =
    db.mysql.password =
    db.mysql.user =

changed
    [debug]
    debug_mode =
to
    [phpframework]
    debug_mode =

changed
    [http_authentication]
to
    [phpframework]
    authentication.http.

changed
    [phpframework_plugins]
to
    [phpframework]
    plugins.