Merge pull request #412 from mato/changelog

Update changelog for v0.6.1 release

Merge pull request #408 from mato/doc-updates

Documentation updates for v0.6.0 release

Minor README tweak

Merge pull request #275 from mato/for-release

Prepare to release 0.4.0

Merge pull request #269 from mato/for-release

Prepare to release v0.3.1

CHANGES.md: Missed Wei Chen as a contributor to 0.3.0

Merge pull request #175 from mato/for-release

Prepare to release 0.2.2

Merge pull request #160 from mato/for-release

Update CHANGES for 0.2.1 point release

Merge pull request #154 from mato/for-release

Documentation updates for 0.2.0 release

Add changelog