Remove the nrf module
Merge https://github.com/moon-bear/QuadcopterFlightControl into nrf_remove
Merge pull request #103 from jackhsu98/nrf_remove

Nrf remove[tested]
Clarify license issue in #75, and minor changes
Use proper word
README: remove the introduction of status monitor
Merge pull request #104 from moon-bear/README

Clarify license issue in #75, and minor changes
Try to support basic travis ci
Fix typo
Merge pull request #106 from moon-bear/support_travis_ci

Support travis ci
Add Travis CI badge
Merge branch 'status_monitor_remove' of https://github.com/moon-bear/firmware into status_monitor_remove
remove status monitor help