Hello, sorry to be such an arduino noob. I'm loving the atmegatron so thought I would have a go at uploading the atcylotron, I have followed your install video and done everything up to the point of uploading the software to the device and I get this error message in arduino software:
Arduino: 1.6.0 (Windows

, Board: "Arduino Uno"
Hardware.ino:19:75: fatal error: MCP23S17.h: No such file or directory
compilation terminated.
Error compiling.
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
I get this one in the previous version of arduino:
Arduino: 1.5.8 (Windows

, Board: "Arduino Uno"
Hardware.ino:19:75: fatal error: MCP23S17.h: No such file or directory
compilation terminated.
Error compiling.
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
Any help would be much appreciated!
Thanks.