document concurrency limitation (related to IVY-605)
document concurrency limitation (related to IVY-605)

git-svn-id: bddd0b838a5b7898c5897d85c562f956f46262e5@671497 13f79535-47bb-0310-9956-ffa450edef68

twogee/ant-ivy,apache/ant-ivy,sbt/ivy,jaikiran/ant-ivy,jaikiran/ant-ivy,jaikiran/ant-ivy,twogee/ant-ivy,apache/ant-ivy,sbt/ivy,apache/ant-ivy,jaikiran/ant-ivy,twogee/ant-ivy,twogee/ant-ivy,apache/ant-ivy