In ghc-7.2.1 the TypeSynonymInstances extension now correctly requires that instances are valid once the type synonym is expanded. This means that when Row is expanded we need to enable the FlexibleInstances extension.
…o operate on multiple files
… over Row and MapRow based CSVs. Also add read/write functions.
…date some bugfixes and increased stability. Bump version to 0.4.0.