Add rotary encoder support, simplify AddMuxButton interface.

examples/full/Makefile

@@ -0,0 +1,8 @@
+TARGET_BOARD=arduino:avr:uno
+COM_PORT=/dev/ttyACM0
+
+build:
+	arduino-cli compile -b ${TARGET_BOARD}
+
+upload:
+	arduino-cli upload -b ${TARGET_BOARD} -p ${COM_PORT}

examples/full/full.ino

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+// An example sketch using the joystick library.
+// This example includes every possible feature of the library.
+// It assumes an Arduino Nano and a 16-channel multiplexer.
+
+#include <Joystick.h>
+#include <Mux.h>
+
+using admux::Pinset;
+
+bool debug = false;
+Joystick joystick(debug);
+
+void setup() {
+  joystick.AddButton(2, BUTTON_PASSTHRU); // this button will always transfer its current literal state to the computer
+
+  joystick.AddButton(3, BUTTON_LATCHED_MOMENTARY); // this button will start sending a buttonpress on one push, and keep it "held down" until it is pushed again.
+
+  joystick.AddButton(4, BUTTON_PULSED); // this button will send a buttonpress very briefly every time it is activated. Good for a toggle switch that shouldn't be "latched" in practice.
+
+  joystick.AddButton(5, BUTTON_PULSED_DOUBLE_ACTION);   // like the above, but it sends its button press when toggled on *and* when toggled off
+
+  joystick.AddButton(6, BUTTON_PULSED_DOUBLE_ACTION_SPLIT);   // again, similar to the above, but it sends two *different* button presses - 'on' will be one button, 'off' another.
+
+  joystick.AddEncoder(7, 8, ENCODER_PULSED_SPLIT); // a rotary encoder that will send 2 different buttonpresses - one when the encoder is turned clockwise, another when it is turned counterclockwise.
+
+  Pinset addr_pins = Pinset(10, 11, 12, 13);
+  uint8_t mux_id = joystick.AddMux(9, addr_pins);
+
+  joystick.AddMuxButton(mux_id, 0, BUTTON_PASSTHRU);
+  
+  // start up serial communication
+  joystick.Init();
+}
+
+void loop() {
+  // check all the button states and send any changes
+  joystick.Update();
+}