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, 1 insertions, 1 deletions

diff --git a/quantum/template/template.h b/quantum/template/template.h
index 22742105a..8537e3b4b 100644
--- a/quantum/template/template.h
+++ b/quantum/template/template.h
@@ -24,7 +24,7 @@
 
 void matrix_init_user(void);
 void matrix_scan_user(void);
-void process_action_user(keyrecord_t *record);
+bool process_action_user(keyrecord_t *record);
 void led_set_user(uint8_t usb_led);
 
 #endif