Updated llvisualize considerably. See Bug #691

Updated llvisualize considerably. See Bug #691
(a) Added capability to trace entire call sequence across a cluster by
stitching the server activity into the client's view.
(b) Ability to parse UML logs.
(c) Added llanalyze like switches to discard/examine only certain
    specific subsystems/masks
(d) Updated help

To invoke ./llvisualize client_log [server_logs]
Note: The client_log *must* be the first file in the sequence.
Any switches may precede it though.
Type llvisualize --help for the man pages.