Added `LayerCount` variable to the example sketches

This took some trial and error to figure out, but once I determined
that the example sketches were being built, I made this change to keep
the build working. Hopefully this will satisfy Travis-CI.

examples/AppSwitcher/AppSwitcher.ino

@@ -46,6 +46,11 @@ const Key keymaps[][ROWS][COLS] PROGMEM = {
 };
 /* *INDENT-ON* */
 
+// Calculate the number of layers defined in the "keymaps[]" array
+// above for use elsewhere in Kaleidoscope. Don't remove or modify
+// this line; it's used to prevent reading past the end of the array!
+const uint8_t LayerCount PROGMEM = sizeof(keymaps) / sizeof(*keymaps);
+
 
 const macro_t *macroAction(uint8_t macroIndex, uint8_t keyState) {
   switch (macroIndex) {

examples/Kaleidoscope/Kaleidoscope.ino

@@ -65,6 +65,11 @@ const Key keymaps[][ROWS][COLS] PROGMEM = {
 
 };
 
+// Calculate the number of layers defined in the "keymaps[]" array
+// above for use elsewhere in Kaleidoscope. Don't remove or modify
+// this line; it's used to prevent reading past the end of the array!
+const uint8_t LayerCount PROGMEM = sizeof(keymaps) / sizeof(*keymaps);
+
 static kaleidoscope::LEDSolidColor solidRed(60, 0, 0);
 static kaleidoscope::LEDSolidColor solidOrange(60, 20, 0);
 static kaleidoscope::LEDSolidColor solidYellow(40, 35, 0);