travis: check PRs if they need squashing or depend on other PRs
Merge pull request #2090 from authmillenon/travis-squash-check

travis: squash check
drivers - netdev: extend netdev_state_t enum
drivers - cc110x: Initial import of new cc110x driver
boards - msbiot: prepare msbiot for new cc110x driver
Merge pull request #1772 from fnack/cc1101_if

drivers - cc110x: Propose new CC110x driver implementation
add mma8652 accelerometer driver
add test app for mma8652 accelerometer driver