A new version of wiringPi. Added in more stuff and fixed it up

for kernels 4.8 onwards.

Some very old stuff might break.

Additional fixes for the ISR code and some tweaks here and
there. I've removed the checks for some operations that might
fail when using the gpiomem interface - which is now the default
way of doing things - if your program segfaults, then you
may need to use sudo on it.

update

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# update - update source files from master on yakko
+
+rsync -aHx --exclude='*.o' --exclude='*~' -v --delete gordon@yakko:rpi/git/wiringPi/ .