Merge branch 'develop': Fix #375, fix #274, fix #373.

diff --cc pigpio.h
index e417b967804a7b80edf4ce599923a94e3088a32f,2f9fc648cfab356bd71863fc9f8b963e380be44f..40d21fcc0918629a959ace54be471c37798a7c27
--- 1/pigpio.h
--- 2/pigpio.h
+++ b/pigpio.h
@@@ -30,7 -30,7 +30,7 @@@ For more information, please refer to <
  #include <stdint.h>
  #include <pthread.h>
  
- #define PIGPIO_VERSION 77
 -#define PIGPIO_VERSION 7800
++#define PIGPIO_VERSION 78
  
  /*TEXT