Version 0.60  - 15 February 2017
              - Added HiPi::GPIO 
              - Extended Energenie ENER314_RT handling to work
              - with Mi|Home range of monitors and switches
              - Refactored HopeRF69 code to make adapting for other
                uses easier
              - refactored 'Controllers' to be 'Boards'
              - Added HiPi::Board::ENER314 - transmit only
                module for OOK controlled switches

Version 0.50  - 21 April 2016
              - Added Energenie ENER314_RT RF board interface
              
Version 0.49  - 06 April 2016
              - Refactored Build.PL so there are no sudo calls or
                package installations in there. Moved all that
                to hipi-install script which now prompts before
                installing any packages.
              - Removed suid scripts hipi-i2c and hipi-pud as they
                are obsolete since introduction of raspi-gpio and
                update of i2c device driver in Rasbian distribution

Version 0.45  - released
              - Added interface for SPI MCP23S17 GPIO extender
              - added convenience methods for MCP23017/MCP23S17
              - Fixed bug in MCP23017 write_register_bits
              - Build HiPI::Wiring against standard Rasbpian package
              - Updated docs for device tree usage

Version 0.44  - 15 March 2016
              - SPI interace fixes
              - Control GUI updates

Version 0.42  - 15 March 2016
              - Build script fixes and pause versioning;

Version 0.35  - 07 March 2016
              - bcm2835 library updated to version 1.50
              - Support for 40 pin GPO Pis
              - Support for RPI 2, RPI 3 and RPI Zero
              - Support Raspbian - Jessie
              - Fixes for Perl > 5.14
              - changed location of downloads to raspberrypi.znix.com
              - Wx version updated to 0.9928
              - Wx::Demo version updated to 0.22
              - Wx::PdfDocument version updated to 0.20
              - Alien::wxWidgets version updated to 0.67

Version 0.33  - 20 May 2013
              - Fixed regression in 0.32 breaking uid and gid settings
              - Add build options to avoid apt calls during cpan tests
              - changed location of downloads to Google Code
              - Wx version updated to 0.9922
              - Wx::Demo version updated to 0.21

Version 0.32  - 26 April 2013
              - Added GPIO interrupt handling classes
              - Many fixes for HiPi::Device::GPIO::Pin
              
Version 0.31  - Unreleased development version  

Version 0.30  - Unreleased development version  

Version 0.29  - 23 April 2013
              - hipi-pud utility added to support setting of PUD resistors
              - set_pud method added to all HiPi::Pin modules allowing
                setting of pull up / pull down resistors from usercode.

Version 0.28  - 23 April 2013
              - bug fixes for HiPi::Device::GPIO::Pin

Version 0.27  - 08 April 2013
              - Using second I2C channel on P5 now tested and supported
              - HiPi::BCM2835::I2C now supports per-instance transfer rates
              - hipi-i2c utility extended to support en/disable of i2c buses
              - GPIO PAD 5 documentation and GUI App display had 3V3 and 5V0
                pins reversed.

Version 0.26  - 23 March 2013
              - Bug in HiPi::BCM2835::I2C->set_baudrate caused peripheral 1
                value to always be set regardless of peripheral specified.
              - Added i2c_write_error / bus_write_error to allow case where
                i2c error condition expected. e.g. when a device has a
                sofware reset and does not complete the i2c transaction
                when reset command is sent.
              - Standardised error handling across all three i2c interfaces.
              - HiPi::Interface::MPL3115A2 gains mode, active, oversample
                and now uses delay based on oversample rate.

Version 0.25  - 19 March 2013
              - fixed bug in hipi-i2c installation

Version 0.24  - 19 March 2013
              - Added hipi-i2c command line utility to allow none Perl code
                access to i2c commands.
              - All calls to external programs ( cat, echo etc. ) are now
                taint safe.
              - Installation now always does an apt-get update before 
                apt-get install (depedency list). My test builds
                often fail at dependency installation time if apt-get update
                is not executed. 
                
Version 0.23  - 18 March 2013
              - bug in i2c C code fixed.
              
Version 0.22  - 17 March 2013
              - Added i2c interface to HiPi::Device::I2C (in addition to SMBus)
              - Added HiPi::BCM2835::I2C - i2c using registers direcly
              - Added HiPi::Interface::MPL3115A2 - to demonstrate repeated
                start operation using HiPi::BCM2835::I2C
              - Updated all i2c using interface modules to accept smbus, i2c
                or bcm2835 backends
                
Version 0.21  - 12 March 2013
              - HiPi::Device::OneWire read bug fixed
              - PWM Pin setting fixed in Control App
              
Version 0.20  - 11 March 2013
              - Refactored HiPi module tree