try adding coverity to travis
edit cmake
Prepare for support of PifaceDigital device
code for future piface support
GPIO now has virtual method; Override mostly everything in PFDigitalGPIO from GPIO.
some work on poll() loop
partial implementation (hackish) of GPIO interrupt support for pifacedigital
checkpoint
writing to GPIO works.
tweak config for raspberry pi + pifacedigital + wiegand
travis fails to build if not in covery branchs. try to fix
Update .travis.yml
add libraries
Add config file for use case: wiegand + pf + rpleth
Minor cleanup: fix var name, and poll() timeout
remove lib;
add mcp23s17 and pifacedigital as submoddules
change libpifacedigital so it point to custom branch with new wait_for_input method
this should fix build on travis
travis config is lost