2.1.0

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Announce 2.1.0

* Depend on -core 1.1.1. Change relevant code accordingly.
* Simplify failure code on syntax validation failure.
* Fix `date-time` format checking: up to three millisecond digits are allowed by
  ISO 8601.
* Joda Time dependency updated to 2.2.

Francis Galiegue (7):
      Update -core dependency to 1.1.0
      Update -core dependency to 1.1.1
      README.markdown update
      Validation{Chain,Processor}: use new .failOnError() method
      pom.xml: update joda-time dependency to 2.2
      DateTimeAttribute: fix ISO 8601 date time recognition
      2.1.0

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>