adding IOShield clas
renamed and added tests
refactured IOShield class
removed unused import
added some register
configured shield with internal pullup activated
change setup to defcon interrupts
Merge branch 'master' of https://github.com/sonopard/PowerCounter
Merge remote-tracking branch 'pi/master' into sonopard

Conflicts:
	raspi/src/ppm.py
added MCP Chip class
and test
executible for test
class fix
added interrupts handler
syntax fix
method call fail
fix, made interrupts according to current connections
fixes
fixed debugs
fixed logger
fixed import
fixed loggers