Revision 136985

ExceptionUtils.getThrowables(Throwable): Switched from concrete
ArrayList local reference to List.

ExceptionUtils.getStackTrace(Throwable): New method for extracting the
text of a stack trace.

ExceptionUtils.getStackFrames(Throwable): Splits an exception's stace
trace into frames.

ExceptionUtils.getStackFrames(String): Splits a stace trace into frames.

NestableDelegate printStackTrace(): Delegate to
printStackTrace(PrintStream) using System.err rather than duplicating
its impl.

NestableDelegate printStackTrace(PrintWriter): Used new name
getStackFrames() method name.

NestableDelegate getStackFrames(Throwable): Renamed decompose() to
this and delegated to ExceptionUtils.getStackFrames(String) for half
of impl.