Added isJustT, isNothingT, isLeftT, isRightT
Add Control.Error.Util.bool
Merge pull request #28 from k0001/bool

Add Control.Error.Util.bool
Merge pull request #26 from k0001/isT-bools

Added isJustT, isNothingT, isLeftT, isRightT
Merge remote-tracking branch 'origin/master' into fix-warnings

Conflicts:
	Control/Error/Util.hs