Added choromanski keymap (#2528)

* Added ergodox layout

* Added preonic layout

* Added readme for exgodox layout

* fixed errors with formatting readme

* Added edited preonic keymap & readme

keyboards/preonic/keymaps/choromanski/config.h

@@ -0,0 +1,52 @@
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include "config_common.h"
+
+
+#ifdef AUDIO_ENABLE
+    #define STARTUP_SONG SONG(PREONIC_SOUND)
+    // #define STARTUP_SONG SONG(NO_SOUND)
+
+    #define DEFAULT_LAYER_SONGS { SONG(COLEMAK_SOUND), \
+                                  SONG(QWERTY_SOUND), \
+                                  SONG(AUDIO_ON_SOUND), \
+                                  SONG(TERMINAL_SOUND), \
+                                  SONG(NO_SOUND), \
+                                  SONG(MUSIC_ON_SOUND) \
+                                }
+#endif
+
+#define MUSIC_MASK (keycode != MU_TOG)
+
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+
+#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 2
+
+#endif
+
+#ifndef TAPPING_TERM
+#define TAPPING_TERM 200
+
+#endif