Prep for deb release as 2.70

This is a general tidyup to detach this fork better from Gordon, who was (and perhaps still is) completely inundated with WiringPi-related support questions.

This changeset includes a number of tweaks which should reduce support burden on Gordon. I believe they are essential if we plan to release a new debian package.

They should - hopefully - not reduce or make ambiguous the origins of this code while achieving the above.

* Remove Gordon's email address from all source files to avoid support queries finding their way to him
* Update wiringPi URLs to the GitHub repository to try and keep bugs/issues within the fork
* Bump version to 2.70 ready for a debian package release
* Update debian package maintainer info, add bugs & homepage URLs to this repository

gpio/Makefile

@@ -2,7 +2,7 @@
 # Makefile:
 #	The gpio command:
 #	  A swiss-army knige of GPIO shenanigans.
-#	https://projects.drogon.net/wiring-pi
+#	https://github.com/wiringPi/wiringPi
 #
 #	Copyright (c) 2012-2016 Gordon Henderson
 #################################################################################

gpio/gpio.1

@@ -105,7 +105,6 @@ BCM_GPIO pin numbers are always used with the export and edge commands.
 This causes the named extension to be initialised. Extensions
 comprise of a name (e.g. mcp23017) followed by a colon, then the
 pin-base, then more optional parameters depending on the extension type.
-See the web page on http://wiringpi.com/the-gpio-utility/
 
 .TP
 .B \-p
@@ -329,7 +328,7 @@ in future releases once the /dev/gpiomem interface is fully operational.
 .LP
 WiringPi's home page
 .IP
-http://wiringpi.com/
+https://github.com/WiringPi/WiringPi/
 
 .SH AUTHOR
 

gpio/gpio.c

@@ -5,7 +5,7 @@
  *	Copyright (c) 2012-2018 Gordon Henderson
  ***********************************************************************
  * This file is part of wiringPi:
- *	https://projects.drogon.net/raspberry-pi/wiringpi/
+ *	https://github.com/WiringPi/WiringPi/
  *
  *    wiringPi is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU Lesser General Public License as published by

gpio/readall.c

@@ -4,7 +4,7 @@
  *	Copyright (c) 2012-2018 Gordon Henderson
  ***********************************************************************
  * This file is part of wiringPi:
- *	https://projects.drogon.net/raspberry-pi/wiringpi/
+ *	https://github.com/WiringPi/WiringPi/
  *
  *    wiringPi is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU Lesser General Public License as published by