CollationKey.java: Implement Comparable.

CollationKey.java: Implement Comparable.

	* java/text/CollationKey.java: Implement Comparable.
	(compareTo(Object)): New method.
	* java/text/Collator.java (compare(Object,Object)): New method.
	Implement Comparator.

	* java/util/zip/InflaterInputStream.java (available): New method.
	(close): New method.
	(read, available, skip, fill): Throw exception if stream closed.
	* java/util/zip/ZipInputStream.java (read, skip, readFully, fill,
	getNextEntry): Throw exception if closed.

From-SVN: r37525