Merge pull request #7 from wdjc100/master

Adjusted the Contributing Code readme
Minor tweaks to contributing code document
1.6.5 - Fixed mess with web page titling which brok command line

- Title being passed back from command function was breaking go_to function when used from the command line
  Changed so title is now a global to simplify functions and stop error
- Improved some error messages, added missing html page titles
1.6.6 - Various improvements to error handling

- Improved handling of unknown CLI commands (it doesn't say to try sudo anymore unless it actually needs sudo
- CLI commands now return correct exit status
- Additional error trapping
Changed ! to === FALSE in LCD position command for correctness
Changed to !== FALSE for correctness
Changed to !== FALSE for correctness
Corrected a comment
Changed order of && statement to make sure all pins attempted
Added Model A to Pi Identification List

Thanks to wdjc100 for the heads up
1.6.7 - Improved Raspberry Pi identification
Added manufacturer info for Rev 0002 & 0003 in board_status
Updated 0002 and 0003 manufacturer details

Turns out TBC is not a manufacturer its To Be Confirmed. Oops :)
Used Dons guess from here instead: http://www.raspberrypi.org/phpBB3/viewtopic.php?p=281257#p281257