Red code legacy renderer (#383)

- Remove some references to gEnv->pRenderer/GetIEditor()->GetRenderer() that is now always null.
- Restore the debug console to existence.
- Stop building the following in preparation for their removal:

Code/CryEngine/Cry3DEngine/*
Code/CryEngine/RenderDll/*
Code/Tools/CryFXC/*
Code/Tools/HLSLCrossCompiler/*
Code/Tools/HLSLCrossCompilerMETAL/*
Code/Tools/RC/*
Code/Tools/ShaderCacheGen/*
Tools/CrySCompileServer/*

Code/CryEngine/CryCommon/CRESky.h

@@ -17,7 +17,7 @@
 //=============================================================
 
 #include "VertexFormats.h"
-#include "../RenderDll/Common/Shaders/Vertex.h"
+#include <Vertex.h>
 
 struct SSkyLightRenderParams;