Merge pull request #223 from bigbrett/v1.3.0-changelog

update changelog in anticipation of v1.3.0 release

Merge pull request #127 from bigbrett/changelog-v1.2.0

add changelog for release

Merge pull request #88 from bigbrett/quickfix-SHE-leak

Fix memory leak in SHE tests

Merge pull request #80 from billphipps/changelog_v1_0_1

Merge pull request #75 from billphipps/doc_updates

Updates to correct documentation bug and minor API tweaks.