hg: lambda/lambda/jdk: Migrate Collector from having multiple boolean properties to a single Set<Characteristics>; update Collector docs

[brian.goetz at oracle.com]

Changeset: 2ffb91b59273
Author:    briangoetz
Date:      2013-04-03 16:12 -0400
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/2ffb91b59273

Migrate Collector from having multiple boolean properties to a single Set<Characteristics>; update Collector docs

! src/share/classes/java/util/stream/Collector.java
! src/share/classes/java/util/stream/Collectors.java
! src/share/classes/java/util/stream/ReferencePipeline.java