bump version and changelog

bump version and changelog

bump version to 0.5.5

Bump version and update readme for version 0.5.4

[version] bump to 0.5.3

Bump version and changelog

Version bump to 0.5.1 and changelog

Updated README and version bump to version 0.5

Closes v.5 milestone.

Also fixes some minor issues with the README. (A missing link and some
misinformation about code coverage)

Version 0.4.1 Release

version 0.4 release prep