Innitial commit of experimental v2 texture system port work. Compiles and runs on windows, at least. Fixing bugs as they come.

Need to test:
localassetbrowser
preview related floaters
hgfloatertexteditor
maps
media textures! Currently very hacky
web browser
alpha masks on avatars
bumpmaps
Are all sky components appearing?
LLViewerDynamicTexture (texture baking, browser, animated textures, anim previews, etc)
Snapshot related features
Customize avatar
vfs floater
UI textures in general
Texture priority issues

indra/newview/llappviewer.cpp

@@ -44,7 +44,7 @@
 #include "lltexteditor.h"
 #include "llalertdialog.h"
 #include "llerrorcontrol.h"
-#include "llviewerimagelist.h"
+#include "llviewertexturelist.h"
 #include "llgroupmgr.h"
 #include "llagent.h"
 #include "llwindow.h"
@@ -654,7 +654,9 @@ bool LLAppViewer::init()
 					&gColors, 
 					LLUIImageList::getInstance(),
 					ui_audio_callback,
-					&LLUI::sGLScaleFactor);
+					&LLUI::sGLScaleFactor,
+					std::string(),
+					LLViewerFetchedTexture::BOOST_ICON);
 	LLWeb::initClass();			  // do this after LLUI
 
 	LLTextEditor::setURLCallbacks(&LLWeb::loadURL,
@@ -1424,12 +1426,12 @@ bool LLAppViewer::cleanup()
     sImageDecodeThread = NULL;
 
 	//Note:
-	//LLViewerMedia::cleanupClass() has to be put before gImageList.shutdown()
+	//LLViewerMedia::cleanupClass() has to be put before gTextureList.shutdown()
 	//because some new image might be generated during cleaning up media. --bao
 	LLViewerMediaFocus::cleanupClass();
 	LLViewerMedia::cleanupClass();
 	LLViewerParcelMedia::cleanupClass();
-	gImageList.shutdown(); // shutdown again in case a callback added something
+	gTextureList.shutdown(); // shutdown again in case a callback added something
 	LLUIImageList::getInstance()->cleanUp();
 	
 	// This should eventually be done in LLAppViewer