CB-5980 Incremented plugin version on dev branch.
Add NOTICE file
CB-6422 [windows8] use cordova/exec/proxy
CB-6381 unexpected error object [WP8]
CB-6460: Update license headers
CB-6465: Add license headers to Tizen code
CB-6452 Updated version and RELEASENOTES.md for release 0.3.6
CB-6452 Incremented plugin version on dev branch.
CB-6491 add CONTRIBUTING.md
windows8. makes getHeading callback spec compliant
CB-6799 Add license
CB-6877 Updated version and RELEASENOTES.md for release 0.3.7
CB-6877 Incremented plugin version.