Clean up cabal file.
Support more recent versions of fclabels.
Bump version to 0.2.0.0 from 0.1.1.3.
Remove imports of deprecated and to-be-removed module, fixing warning.

Removes import of Control.Monad.Instances from the following modules:
  * Control.Monad.Abort.
  * Control.Monad.Abort.Class.
Remove redundant imports from Control.Monad.Abort.Instances.

Removes imports of the following modules:
  * Control.Monad.Reader
  * Control.Monad.Writer
  * Control.Monad.State
Bump version to 0.2.0.1 from 0.2.0.0.