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/llsurface.h

@@ -46,7 +46,7 @@
 
 #include "llvowater.h"
 #include "llpatchvertexarray.h"
-#include "llviewerimage.h"
+#include "llviewertexture.h"
 
 class LLTimer;
 class LLUUID;
@@ -133,8 +133,8 @@ public:
 	void setWaterHeight(F32 height);
 	F32 getWaterHeight() const;
 
-	LLViewerImage *getSTexture();
-	LLViewerImage *getWaterTexture();
+	LLViewerTexture *getSTexture();
+	LLViewerTexture *getWaterTexture();
 	BOOL hasZData() const							{ return mHasZData; }
 
 	void dirtyAllPatches();	// Use this to dirty all patches when changing terrain parameters
@@ -206,8 +206,8 @@ protected:
 
 
 	// The textures should never be directly initialized - use the setter methods!
-	LLPointer<LLViewerImage> mSTexturep;		// Texture for surface
-	LLPointer<LLViewerImage> mWaterTexturep;	// Water texture
+	LLPointer<LLViewerTexture> mSTexturep;		// Texture for surface
+	LLPointer<LLViewerTexture> mWaterTexturep;	// Water texture
 
 	LLPointer<LLVOWater>	mWaterObjp;