v2.13

Code updates and changelog for 2.13 release

v2.10

Updated version and changelog for 2.10 release

v2.9

Updated toc and changelog for 2.9 release

v2.8

Updated toc and changelog for 2.8 release

v2.7

tagged as v2.7

v2.6

update to changelog and readme

v2.5.3

Update version and changelog

v2.5.2

Update version and changelog

v2.5.1

Update version and changelog

v2.5

Update to TOC and changelog