Reviewed by Darin.

    Reviewed by Darin.

        - moved all loader code that is slated to be moved down to WebCore to a new Loader directory

        (next step is to remove dependencies on the rest of WebKit from this directory)

        * Loader/WebNetscapePlugInStreamLoader.h: Added.
        * Loader/WebNetscapePlugInStreamLoader.m: Added. Cut out of WebNetscapePluginStream.m
        (-[WebNetscapePlugInStreamLoader initWithStream:view:]):
        (-[WebNetscapePlugInStreamLoader isDone]):
        (-[WebNetscapePlugInStreamLoader releaseResources]):
        (-[WebNetscapePlugInStreamLoader didReceiveResponse:]):
        (-[WebNetscapePlugInStreamLoader didReceiveData:lengthReceived:]):
        (-[WebNetscapePlugInStreamLoader didFinishLoading]):
        (-[WebNetscapePlugInStreamLoader didFailWithError:]):
        (-[WebNetscapePlugInStreamLoader cancelWithError:]):
        * Plugins/WebNetscapePluginStream.m:
        * WebKit.xcodeproj/project.pbxproj:
        * WebCoreSupport/WebSubresourceLoader.h: Moved to Loader/
        * WebCoreSupport/WebSubresourceLoader.m: Moved to Loader/
        * WebView/WebFrameLoader.h: Moved to Loader/
        * WebView/WebFrameLoader.m: Moved to Loader/
        * WebView/WebLoader.h: Moved to Loader/
        * WebView/WebLoader.m: Moved to Loader/
        * WebView/WebMainResourceLoader.h: Moved to Loader/
        * WebView/WebMainResourceLoader.m: Moved to Loader/

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@15794 268f45cc-cd09-0410-ab3c-d52691b4dbfc