Added Mechmini 2.0 to Mechmini keyboard folder

This creates a v1 and v2 subproject.  V1 retains all the same implementations of the bootmapper-ported Mechmnini 1 including #2196.  V2 adds the Mechmini 2.0 kayboard support (I know it took me way to long to get it a pull request in).

All readme's updated to reflect compiling the two seperate keyboards.  Simply either `make mechmini/v1:default` or `make mechmini/v2:defualt`.  Utilizing the rules.mk using `make mechmini:default` will automatically create the Mechmini 2 default keymap as this is the current version and has a much wider user base.

keyboards/mechmini/v2/keymaps/split_space/keymap.c

@@ -0,0 +1,115 @@
+#include "mechmini.h"
+
+#define _BL 0
+#define _FN1 1
+#define _FN2 2
+
+#define MODS_CTRL_MASK  (MOD_BIT(KC_LSHIFT)|MOD_BIT(KC_RSHIFT))
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+	[_BL] = KEYMAP_SPLIT_SPACE(
+		F(0), KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSPC,
+		KC_TAB, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_ENT,
+		KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_RSFT, KC_DOT,
+		KC_LCTL, KC_LALT, KC_LGUI, KC_SPC, KC_SPC, KC_RCTL, MO(1), MO(2)),
+
+	[_FN1] = KEYMAP_SPLIT_SPACE(
+		KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_DEL,
+		KC_TRNS, KC_PGUP, KC_VOLU, KC_TRNS, KC_TRNS, KC_TRNS, KC_LBRC, KC_RBRC, KC_MINS, KC_EQL, KC_TRNS,
+		KC_LSFT, KC_PGDN, KC_VOLD, KC_TRNS, KC_TRNS, KC_SCLN, KC_QUOT, KC_SLSH, KC_COMM, KC_TRNS, KC_HOME,
+		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+
+	[_FN2] = KEYMAP_SPLIT_SPACE(
+		KC_PWR, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, RESET,
+		KC_TRNS, BL_TOGG, BL_STEP, BL_INC, BL_DEC, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+		KC_CAPS, RGB_TOG, RGB_MOD, RGB_VAI, RGB_VAD, RGB_HUI, RGB_HUD, RGB_SAI, RGB_SAD, KC_TRNS, KC_END,
+		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+
+};
+
+const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) {
+
+
+	switch (id) {
+
+	}
+	return MACRO_NONE;
+}
+
+void matrix_init_user(void) {
+}
+
+void matrix_scan_user(void) {
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+	return true;
+}
+
+void led_set_user(uint8_t usb_led) {
+
+	if (usb_led & (1 << USB_LED_NUM_LOCK)) {
+
+	} else {
+
+	}
+
+	if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
+
+	} else {
+
+	}
+
+	if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
+
+	} else {
+
+	}
+
+	if (usb_led & (1 << USB_LED_COMPOSE)) {
+
+	} else {
+
+	}
+
+	if (usb_led & (1 << USB_LED_KANA)) {
+
+	} else {
+
+	}
+
+}
+
+enum function_id {
+    SHIFT_ESC,
+};
+
+const uint16_t PROGMEM fn_actions[] = {
+  [0]  = ACTION_FUNCTION(SHIFT_ESC),
+};
+
+void action_function(keyrecord_t *record, uint8_t id, uint8_t opt) {
+  static uint8_t shift_esc_shift_mask;
+  switch (id) {
+    case SHIFT_ESC:
+      shift_esc_shift_mask = get_mods()&MODS_CTRL_MASK;
+      if (record->event.pressed) {
+        if (shift_esc_shift_mask) {
+          add_key(KC_GRV);
+          send_keyboard_report();
+        } else {
+          add_key(KC_ESC);
+          send_keyboard_report();
+        }
+      } else {
+        if (shift_esc_shift_mask) {
+          del_key(KC_GRV);
+          send_keyboard_report();
+        } else {
+          del_key(KC_ESC);
+          send_keyboard_report();
+        }
+      }
+      break;
+  }
+}