Bugfix in DateTime#format

• Improved documentation for DateTime.add()/sub()/addLocal()/subLocal()
• Removed console.log() statement
• Bugfix: DateTime#format() would throw if a zone was specified in the format string but no zone was present
• DateTime#format() now trims the string before returning it.

remove DateTime#_unitUtcMillisCache member in favor of a global cache

This makes DateTime objects easier to compare as there is no changing cache included.

Bugfix in parsing dates with zeroes.

v1.24.1

v1.24.1: bugfix in parsing dates with zeroes.

v1.24.0: add parsing of date strings according to given format.

v1.24.0: add parsing of date strings according to given format.

Add method to check if a date exists in its time zone

v1.23.0

v1.23.0: add method DateTime.exists() to validate a date in its time …

TZ database 2015g

v1.22.2

v1.22.2: tz database 2015g

Fix dev-dependencies listed as dependencies

1.22.1

v1.22.1: fix dev-dependencies listed as dependencies

Add method to retrieve time zone names (issue #21)

v1.22.0

v1.22.0: Add method to retrieve all time zone names to TzDatabase

Upgrade to TZ database 2015f

v1.21.1

v1.21.1: upgrade to TZ database 2015f

new method to get next DST transition moment

v1.21.0

v1.21.0: add method to get next DST change moment