Summary: update javadoc to specify NPE as well as fix minor bug in implementation.
Reviewed-by: alanb

Reviewed-by: mchung, iris

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Summary: Add new methods in ManagementFactory class to obtain platform MXBeans
Reviewed-by: alanb, dfuchs, emcmanus

Summary: Clarify wording for 'prefix' parameter to setNativeMethodPrefix().
Reviewed-by: sspitsyn

Reviewed-by: alanb, iris, lmalvent, bristor, peterjones, darcy, wetmore

Reviewed-by: alanb, iris

Reviewed-by: iris

Reviewed-by: iris