tests/print_number_test: stay on when unplugged
Merge branch 'master' of https://github.com/dhiltonp/hexbright
library: bad accelerometer reads now correctly reread
library: added twi library for use in hexbright library instead of Wire.h
libraries/twi: added 'extern "C"' wrapper
updated repository to use twi.h instead of Wire.h
libraries/twi: adjusted buffer length to the max we need
libraries/twi: removed slave-specific twi code
libraries/twi: Readme mentions removal of slave code, benefits of the changes.
experiments/power_draw: added a note about input/output power differential.
.gitignore: ignore 'samples' as well as 'hexbright-samples'