Revert "Merge branch 'master' of https://github.com/ideo/core-firmware"

This reverts commit 41c9aa3bf9b6cb32c0034d24a8e76e090853d554, reversing
changes made to e201d2e735b1be1ea53f6a123a15e4f6dc886ddb.
replace message parser with a real JSON parser (cJSON) and add a way to run unit tests
udp broadcasts are sending