Refactor all usage of RegisterFunction to ScriptFunction::Register

- Replace ScriptInterface::RegisterFunction with
ScriptFunction::Register
 - Mostly removing unused cmpPrivate*
 - Some usage introduces specific getters (mapgenerator, AIWorker,
XmppClient,...)
 - Several passthrough functions are simply removed in favour of calling
the original, reducing duplication
 - Make use of ScriptRequest/ScriptInterface capabilities where
relevant.
- Make JSI_* headers only expose necessary functions, lightening them
considerably and reducing duplication
 - Reuse namespaces in JSI_* implementations directly, reducing visual
noise there

Follows f3aedf88a6

Differential Revision: https://code.wildfiregames.com/D3626
This was SVN commit r24983.

source/ps/scripting/JSInterface_Console.cpp

@@ -23,7 +23,7 @@
 #include "ps/CLogger.h"
 #include "scriptinterface/FunctionWrapper.h"
 
-namespace
+namespace JSI_Console
 {
 CConsole* ConsoleGetter(const ScriptRequest&, JS::CallArgs&)
 {
@@ -34,10 +34,10 @@ CConsole* ConsoleGetter(const ScriptRequest&, JS::CallArgs&)
 	}
 	return g_Console;
 }
-}
 
-void JSI_Console::RegisterScriptFunctions(const ScriptRequest& rq)
+void RegisterScriptFunctions(const ScriptRequest& rq)
 {
 	ScriptFunction::Register<&CConsole::IsActive, ConsoleGetter>(rq, "Console_GetVisibleEnabled");
 	ScriptFunction::Register<&CConsole::SetVisible, ConsoleGetter>(rq, "Console_SetVisibleEnabled");
 }
+}