Change log

0.3.0.0

• Removed TxErrorType and change the errorType field on TxException to errcode.

0.2.0.0

• Changed the TxM encoding from a plain newtype-over-IO to a reader.
• Removed the Tx and UnsafeTx type classes.
• TxEnv is now a type class. Added TxEnvs for convenience.
• Added TxException.
• Added the HEnv type.
• Changed module structure so that unsafe functions are provided in an Unsafe module.

0.1.0.0

Initial release