Changed the way that ResourceLoaderFileModule and mediaWiki.loader work in debug...

Changed the way that ResourceLoaderFileModule and mediaWiki.loader work in debug mode. As of this commit, in debug mode, ResourceLoaderFileModule will emit code which appends a a script tag for each raw JavaScript file in the module, instead of the concatenated code of the module's scripts. This eliminates the need to disable batch loading on the client in debug mode, since it effectively supersedes the effect of turning batch loading off.