refactor display

- part of components
- separation between LMS & driver
- move slimp message to squeezelite

components/display/display.h

@@ -1,33 +0,0 @@
-/* 
- *  (c) Philippe G. 2019, philippe_44@outlook.com
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#pragma once
-
-struct display_handle_s {
-	bool (*init)(char *config, char* welcome);
-	void (*print_message)(char *msg);
-	void (*vfdc_handler)(u8_t *data, int len);
-	void (*grfe_handler)(u8_t *data, int len);
-	void (*grfb_handler)(u8_t *data, int len);
-	void (*visu_handler)(u8_t *data, int len);
-}; 
-
-extern struct display_handle_s SSD1306_handle;
-
-
-