So that shell scripts do not blunder on after errors.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

round at last..

Updated for the 0x0012 board revision on the new A+

bugfix in blink.sh - wring pin
improving the maxdetect routing - a little.
gpio pins

Written some examples for the PiGlow board
bumped wiringPi version

bumped version.

so write a little test program with it too.
Updated gpio to use the sn3218 too.

Added the Quick 2 Wire codes, etc.
Minor typo/bug fixes.
Added more modules into gpio -x

Added in generic 'blink' programs in the examples in C, RTB and Shell.
Updated wiringPi with a little big-file on the millis() function and
added in a new micros() function too.
Updated the examples with standard LGPL headers.
Added a new isr-osc.c test program - just for ISR timing purposes.

on non Raspbian systems (and even on some Raspbian systems it would appear ):

fixed a timing issue on softTone
fixed some issues in wiringPisetup introduced when optimising the mmap calls.

and developed the new ISR - Interrupt Service Routine
handler - much easier than the old waitForInterrupt code!

Minor tweaks to the gpio program to recognise the environment variable
WIRINGPI_DEBUG too, and removed the printing of the errors from the
main wiringPi setup routines (and added some new ones!)

delayMicrosecondsHard re-written - again.
Added a serialRead example program, and added in the okLed
to the examples too.
Updated/checked some of the GPIO/PWM code.
Added in some experimental servo and tone generating code and
and example or 2.
Tweaks to the gpio command to correctly load the I2C modules too.

Fixed timing in the LCD library to work with new dealyMicroseconds
Minor typos and bigfixes to the gpio command.

Changed the gertboard code to use it
and ran more tests on he Gertboard code.

and an example.