CB-4908 Long.valueOf(0) instead of new Long(0)

Use Long.valueOf(0) instead of new Long(0). Also do the same for new
Integer(0).

Reason:
http://stackoverflow.com/a/13145360/1412800
CB-5980 Updated version and RELEASENOTES.md for release 0.2.6
CB-5980 Incremented plugin version on dev branch.
Add NOTICE file
CB-6212 iOS: fix warnings compiled under arm64 64-bit
CB-6460: Update license headers
CB-6465: Add license headers to Tizen code
CB-6452 Updated version and RELEASENOTES.md for release 0.2.7
Merge tag 'r0.2.7'

Conflicts:
	RELEASENOTES.md
	plugin.xml