Added new code for max31855

with wiringPiISR.
Added the ability to readall/reset from extension modules.
Changed the build script to use /bin/sh rather than /bin/bash as it seems
some installations don't have /bin/bash (or if they do, then the people who
are telling me that ./build gives them command not found are wrong)

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

the module.
Typo in gpio man page
Bug fixed in board revision detection (which would never happen
anyway, however)

(Or maybe Broadcom did!!!)

one of the GPCLK drivers to generate a frequency up to
19.2MHz.

Tidied some code up and added the clock functions into the gpio
utility.

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.

I2C libraries again - but only if the right headers are
installed!

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.

(hopefully!)
Also updated all the mmap code in wiringPiSetup() to make it a bit more
sane and efficient to a degree.

libraries.
Bumped gpio version.

Changed built to work marginally better.

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.

Also Makefile tweaks to help improve things somewhat - decided to
read the Makefile manual after some 15 years to updated my make
grey cells somewhat.

New command in the gpio command - readall

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

allow access to the wiringPi to BCM_GPIO pin mapping tables.

hardware revision number... So have adapted wiringPi to cope.

accomodate the changes in pin that are present on the Revision
2 Raspberry Pi board.

Added in simple debugging too - set the environment variable
  WIRINGPI_DEBUG
to get some more debug messages out

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

and an example.

code. Seems the old 4011 in the NES controller isn't that fast
afterall!

to pumSetRange() happens.

ANDing with 0x3FF was wrong anyway as the PWM counter does from zero
to the top value, not top-1 as I originally thought.

Conflicts:
	gpio/gpio.c

Updated wiringPi to add new PWM controls.

Added top-level build script for lazy building.

in pinMode ()

General tidying up of some of the code round delayMicroseconds