update changelog and prepare for release 2.16.3 (#298)

Update changelog and prepare for release 2.16.3

prepare for release 2.16.2 (#292)

Update changelog and prepare for release 2.16.2

prepare for release 2.16.1 (#289)

Update changelog and prepare for release 2.16.1

prepare for release 2.16.0 (#283)

Update changelog and prepare for release 2.16.0

update changelog and prepare for release 2.15.2 (#281)

Update changelog and increment version number for release 2.15.2

prepare for release 2.15.1 (#268)

Update changelog and increment version number for release 2.15.1

prepare for release 2.15.0 (#260)

Update changelog and increment version number for release 2.15.0

prepare for release 2.14.0 (#243)

Increment version and prepare changelog for release.

prepare for release 2.13.0 (#234)

Update changelog and increment version number for release

prepare for release 2.12.0 (#222)

update changelog and increment version number for release