CB-6809 Add license to CONTRIBUTING.md
Cached extra info to better detect changes.
updated notice file to include missing license
CB-6877 Updated version and RELEASENOTES.md for release 0.2.9
CB-6877 Incremented plugin version.
CB-6907: android: Don't crash on startup if no networks available
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-plugin-network-information