[Nutch Wiki] Update of "bin/nutch_readseg" by LewisJohnMcgibbney

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The "bin/nutch_readseg" page has been changed by LewisJohnMcgibbney:
http://wiki.apache.org/nutch/bin/nutch_readseg

Comment:
Update to reflect Nutch 1.3 API

New page:
Readseg is an alias for org.apache.nutch.segment.SegmentReader

This class is similar to readdb in that it dumps the contents of a segment. There are three ways we can use this class:

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1st Usage: bin/nutch readseg -dump <segment_dir> <output> [general options] 
{{{

'''-dump''': Dumps content of a <segment_dir> as a text file to <output>. 

'''[general options]''': General options are provided below.

}}}
2nd Usage: bin/nutch readseg -list (<segment_dir1> ... | -dir <segments>) [general options] 
{{{

'''-list''': This arguement lists a synopsis of segments in specified directories, or all segments in a directory <segments>, and prints details of them to System.out.

'''<segment_dir1> ...''': This should be a list of the paths for individual segment directories to process.
 
'''-dir <segments>''': Should be a path to a directory that contains multiple segments.

'''[general options]''': General options are provided below.

}}}
3rd Usage: bin/nutch readseg -get <segment_dir> <keyValue> [general options] 
{{{

'''-get''': This arguement gets a specified record from a segment, and prints it on System.out.

'''<segment_dir>''': Path to the segment directory.

'''<keyValue>''': This should be the value of the key (url) we wish to retreive specific information about. N.B. It is essential to put "double-quotes" around strings with spaces.

'''[general options]''': General options are provided below.

 * '''-nocontent''': Pass this to ignore the content directory.
 * '''-nofetch''': To ignore the crawl_fetch directory.
 * '''-nogenerate''': To ignore the crawl_generate directory.
 * '''-noparse''': To ignore the crawl_parse directory.
 * '''-noparsedata''': To ignore the parse_data directory.
 * '''-noparsetext''': To ignore the parse_text directory.
 
 
CommandLineOptions