FIX: Issue #15; Prevent the PiGPIO library from internally handling s…

…ignals and preventing signals from reaching the JVM.

libraries/pi4j-library-pigpio/src/main/native/com_pi4j_library_pigpio_internal_PIGPIO.c

@@ -155,6 +155,13 @@ JNIEXPORT jint JNICALL Java_com_pi4j_library_pigpio_internal_PIGPIO_gpioHardware
 JNIEXPORT jint JNICALL Java_com_pi4j_library_pigpio_internal_PIGPIO_gpioInitialise
   (JNIEnv *env, jclass class)
 {
+    // SEE: https://github.com/Pi4J/pi4j-v2/issues/15
+    //  By default, PIGPIO steals all the signal handlers. The JVM doesn't like this
+    //  as it uses them in running the JVM so it ends up with the program crashing.
+    //  The following should disable the signal handlers inside the PIGPIO library.
+    gpioCfgSetInternals (gpioCfgGetInternals () | PI_CFG_NOSIGHANDLER);
+
+    // perform initialization of the PIGPIO library
     return gpioInitialise();
 }