Upstream bugfix release. Notable changes:

• Fix backwards moving cycle timer in isochronous transmit. The problem has been observed with audio I/O on different systems.
• Fix crash with SIGBUS on SPARC and similar architectures.
• Fix memory leak in address range mapping response handler.
• Fix errno reporting to applications which relied on behavior of libraw1394 1.x.
• Fix errno checking in the dumpiso and sendiso example programs.
• Minor documentation improvement.