document changes
Merge pull request #207 from davispuh/changelog

Document changes
Update HISTORY
Bump version
Release 0.10.0
Support `ActiveSupport::TimeZone` as `Chronic.time_class` (fixes #208)
Merge pull request #209 from davispuh/timezone_fix

Support `ActiveSupport::TimeZone` as `Chronic.time_class` (fixes #208)
update history
Bump version
Release 0.10.1
Ruby 1.8 compatibility

And bugfix for time with negative timezone
Merge pull request #212 from davispuh/patch-1

Ruby 1.8 compatibility