Merge pull request #252 from madelson/release-2.7

Release 2.7

Merge pull request #239 from madelson/release-2.6

Release 2.6

Merge pull request #232 from madelson/release-2.5.1

Release 2.5.1

Merge pull request #220 from madelson/release-2.5

Release 2.5

Merge pull request #200 from madelson/release-2.4

Release 2.4

2.3.4 release

Update README.md

Update README.md

Merge pull request #135 from madelson/release-2.3.1

Release 2.3.1

Merge pull request #114 from madelson/release-2.3

Release 2.3