6.2.0

• Dropped Holey/HoleyT in favour of simpler Format type.
• Added Monoid instance.
• Added back Category instance.
• Dropped Functor instance.

6.1.1

• Add support for GHC 7.10 (time update).

6.1.0

• Add formatter for TimeSpec.

6.0.0

• Changed the type of Format. Now you write Format r (a -> r) instead of Format a.
• Add formatToString function.