FIX: Parsing publication date in Ant tasks not thread-safe (IVY-1412)

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/trunk@1451412 13f79535-47bb-0310-9956-ffa450edef68
DOCUMENTATION: Broken link in <dependency> documentation (IVY-1405)

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/trunk@1451415 13f79535-47bb-0310-9956-ffa450edef68