Rework plugin code to prepare to move more of it into WebKit.

	* khtml/rendering/render_applet.cpp:
	(RenderApplet::RenderApplet): Create a widget for the applet using
	the new simpler API.

	* kwq/kdecore/kconfig.h:
	* kwq/KWQKConfigBase.mm: Eliminate KConfigBase.
	Set things up so we are poised to handle the other non-plugin
	config keys easily in the future.

	* kwq/KWQKHTMLPart.mm: (KHTMLPart::requestObject): Use the new simpler
	IFPluginWidgetCreate API instead of the older WCPluginWidget one.

	* kwq/qt/qstring.h: Add simpler conversions to/from NSString.
	* kwq/KWQString.mm: (QString::fromNSString): New.

	* kwq/WCPluginWidget.h: Made this API simpler both for the C++
	side and the Objective-C side. There's now no class, and only one
	function that needs to be supplied (normally by WebKit).
	* kwq/WCJavaAppletWidget.h: Same thing for the Java case.

	* kwq/WCJavaAppletWidget.mm:
	(IFSetJavaAppletViewCreationFunction): New.
	(IFJavaAppletWidgetCreate): New. Most of the code that was in here
	is now moved into WebKit.
	* kwq/WCPluginWidget.mm:
	(IFSetPluginViewCreationFunction): New.
	(IFPluginWidgetCreate): New. Most of the code that was in here
	is now moved into WebKit.

	* libwebcore.exp: Update for new function names.

WebKit:

	Rework plugin code to prepare to move more of here from WebCore.

	* Plugins.subproj/IFPluginView.mm:
	(IFPluginViewCreate): New. Does all the work of creating an NSView
	for a plug-in, including stuff previously done in WebCore.
	(IFJavaAppletViewCreate): Same as above, for Java applets.
	(+[IFPluginView load]): Set up the function pointers using the new
	improved WebCore API.

	* Plugins.subproj/IFNullPluginView.mm:
	(-[IFNullPluginView load]): Remove this setup because now there's
	no separate call to set up a null plug-in.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@1075 268f45cc-cd09-0410-ab3c-d52691b4dbfc