Permit correct merging of config files.

[samwilson]

The load_paths setting needs to always be an array of arrays, so that config files can be correctly merged (e.g. so other modules can add paths to the list).

[samwilson]

It may also be a good idea to make these associative arrays, e.g.

Assets::JAVASCRIPT => array(
    'modulename' => DOCROOT.'js'.DIRECTORY_SEPARATOR
), 

So that other modules can overwrite paths that have been loaded before them.

(Thanks to Zeelot in IRC for this suggestion.)

[hkdobrev]

+1

[hkdobrev]

@ivank ping.