Implement basic allocation readback.  Add Get height, width to ScriptC_Lib.
diff --git a/libs/rs/rsContext.h b/libs/rs/rsContext.h
index 799c443..54c555f 100644
--- a/libs/rs/rsContext.h
+++ b/libs/rs/rsContext.h
@@ -115,6 +115,9 @@
         mFloatDefines.add(String8(name), value);
     }
 
+    uint32_t getWidth() const {return mWidth;}
+    uint32_t getHeight() const {return mHeight;}
+
 protected:
     Device *mDev;