plume-util 1.7.0

• Moved classes Hasher, WeakHasherMap, and WeakIdentityHashMap
  to a new project, hashmap-util. It is available on Maven Central.
• In ArraySet:
  • new method ArraySet.sort.
  • widened the formal parameter type of newArraySetOrHashSet and newArraySetOrLinkedHashSet.
• New methods in CollectionsPlume:
  • sortedSetContainsAll, sortedSetEquals, and withoutDuplicatesSorted.
  • deepCopy(List), deepCopy(TreeSet), deepCopy(Map), and deepCopyValues(Map).
• New method UtilPlume.clone(Object).
• New method StringsPlume.toStringTruncated(Object, int).