v0.16.0

Added:

• Add new :stamp_datetime_format param stamp_changelog action to support custom a user provided date time format (PR #53). Stamped date is now in UTC format - not local since previously it was using Time.now which returned local time

Changed:

• BREAKING CHANGE: :stamp_date param on stamp_changelog action has been renamed to :should_stamp_date

Fixed:

• Fixes some typos of the word "successfully"