Release 1.4.2

Merge pull request mdtraj#849 from rmcgibbo/release-1.4.0

Release 1.4.0

Merge pull request mdtraj#742 from rmcgibbo/release-1.3.0

Release 1.3.0

Release version 1.2.0

Release version 1.1

Release version 1.0. cc mdtraj#572

Merge pull request mdtraj#489 from rmcgibbo/release

0.9.0 release

Release 0.8.0

Update version to 0.7.0

set ISRELEASED back to false