updating version numbers and README for 16.2

updating version numbers and README for 15.4

updating version numbers and README for 16.1

updating version numbers and README for 15.3

updating version numbers and README for 16.0

updating version numbers and README for 16-RC1

updating version numbers and README for 15.2

updating version numbers and README for 16-beta

updating version numbers and README for 14.5

updating version numbers and README for 15.1