Add calibration routine back in. Still needs some work (need debounce and filtering on touches)
Add calibration routine back in.
Still needs some work (need debounce and filtering on touches)

git-svn-id: 077ef79d8acf1221d27cbbe7b66350fb4671a68b@514 ad39a8c3-5e57-4819-ba6d-ac3c945a73f6

brewbit/model-t,brewbit/model-t,brewbit/model-t