0.2.1.3 Duncan Coutts <duncan@well-typed.com> May 2015
        * Compatibility with GHC 7.10 (no API changes)

0.2.1.2 Adam Gundry <adam@well-typed.com> July 2014
        * Compatibility with GHC 7.8 (no API changes)

0.2.1.1 Duncan Coutts <duncan@well-typed.com> May 2014
        * Fix for NaN scores with a doc field that is empty for all docs
        * Add instance Show NoFeatures

0.2.1.0 Duncan Coutts <duncan@well-typed.com> March 2014
        * Add auto-complete / auto-suggest feature
        * Add demo program
        * Moved QC props into a separate test suite
        * Work sponsored by IRIS Connect Ltd.

0.2.0.0 Duncan Coutts <duncan@well-typed.com> Feb 2014
        * Initial version as a separate library

0.1.1.0 Duncan Coutts <duncan@community.haskell.org> Nov 2013
        * Add "explain" mode for query
        * Add non-term feature scores

0.1.0.1 Duncan Coutts <duncan@community.haskell.org> Sept 2013
        * Fix bug in index update (thanks to Matthew Gruen)

0.1.0.0 Duncan Coutts <duncan@community.haskell.org> July 2013
        * Initial version (included in hackage-server)