Merge pull request #13 from MLXXXp/user_screen_access

Add uView.screenBuffer() for access to screen RAM.

MicroView.cpp

@@ -904,6 +904,14 @@ void MicroView::flipHorizontal(boolean flip) {
 	}
 }
 
+/** \brief Get pointer to screen buffer
+
+	Return a pointer to the start of the RAM screen buffer for direct access.
+*/
+uint8_t *MicroView::getScreenBuffer(void) {
+	return screenmemory;
+}
+
 /** \brief Parse command.
 
 	Command stored in serCmd array will be parsed to performed draw functions.