not showing metadata if it's empty
Merge pull request #136 from matthewsibigtroth/missing_metadata_layout_fixes

not showing metadata if it's empty
ensuring that notification is removed onDestroy
Merge pull request #137 from matthewsibigtroth/service_notification_appearance_fix

ensuring that notification is removed onDestroy
Add FCC warning
RFduino firmware: fix comment so that sketch compiles
RFduino firmware: move into directory so that can be loaded into Arduino IDE
updated build.gradle to latest sdk
Close #141. Android firmware API 5.0 update

- firmware/android/app/build.gradle version updated to ’21.0.2’
- Updated UriBeaconAdvertiserActivity.java for API Level 21
Replaced relevant instances of device with beacon
Merge pull request #140 from matthewsibigtroth/sdk_version_update

updated build.gradle to latest sdk
Merge pull request #143 from matthewsibigtroth/replace_device_with_beacon

Replaced relevant instances of device with beacon
Merge pull request #142 from keremgocen/#141

Close #141. Android firmware API 5.0 update

Thanks!
Create CONTRIBUTORS
Merge pull request #138 from gbuesing/rfduinofix

Rfduino firmware fixes
Merge pull request #144 from schilit/gatt-helper

Gatt helper error paths and cleanup
LGTM. Merging.
Merge branch 'master' into gatt-helper
Fix for Android L