Leader key implementation (#326)

* implements leader key for planck experimental

* allows override of leader timeout

* adds ability to use the leader key in seq

* fixes leader keycode

* adds chording prototype

* fixes keycode detection

* moves music mode to quantum.c

* disables chording by default

* updates process_action functions to return bool

1 files changed, 4 insertions, 3 deletions

diff --git a/quantum/template/template.c b/quantum/template/template.c
index 6050a2d20..649072eb2 100644
--- a/quantum/template/template.c
+++ b/quantum/template/template.c
@@ -11,8 +11,9 @@ void matrix_scan_user(void) {
 }
 
 __attribute__ ((weak))
-void process_action_user(keyrecord_t *record) {
+bool process_action_user(keyrecord_t *record) {
         // leave this function blank - it can be defined in a keymap file
+    return true;
 }
 
 __attribute__ ((weak))
@@ -34,11 +35,11 @@ void matrix_scan_kb(void) {
         matrix_scan_user();
 }
 
-void process_action_kb(keyrecord_t *record) {
+bool process_action_kb(keyrecord_t *record) {
         // put your per-action keyboard code here
         // runs for every action, just before processing by the firmware
 
-        process_action_user(record);
+        return process_action_user(record);
 }
 
 void led_set_kb(uint8_t usb_led) {