Update README + examples
Update README
Add raspi board revision validation for pins and i2c interface.
Move read cpuinfo to own method for easy stubbing, fix initial WIP on tests.
Merge pull request #28 from hybridgroup/whitelist-pins

Add correct revision handling of pins.
update readme for import script
Merge pull request #29 from hybridgroup/readme-import

Update readme for import script
Bump up version to 0.14.1