install now uses python3
added asm_generic_ioctl
merged in interupts
reordered write arguments to be more consistent
added input and output pins to the PiFaceDigital class
added board detection
updated handler var in pifacedigital class
removed pointless handler variables and made PiFaceDigital items plural, lists should always be plural
updated readme and made PEP8 compliant
moved to python 3
example interrupt test functions did not work.
added spi instructions
fixed headings
Merge branch 'tpdev'
Interrupts has a double 'r', doh!
module now uses common module
fixed but in item handler
updated install script to install pifacecommon
updated readme
created unit tests