2.1.0

• added last option
• added format option

2.0.4

• added multiple groups
• added order
• subsequent methods no longer modify relation

2.0.3

• implemented respond_to?

2.0.2

• where, joins, and includes no longer need to be before the group_by method

2.0.1

• Use time zone instead of UTC for results

2.0.0

• Returns entire series by default
• Added day_start option
• Better interface

1.0.5

• Added global time_zone option

1.0.4

• Added global week_start option
• Fixed bug with NULL values and series

1.0.3

• Fixed deprecation warning when used with will_paginate
• Fixed bug with DateTime series

1.0.2

• Added :start option for custom week start for group_by_week

1.0.1

• Fixed series for Rails

1.0.0

• First major release