[svn-r15969]

Introduced a new feature in the tools library regarding command line parsing
In the definition of arguments, an "*" means that the switch can or can not have an optional argument. This "*" is put in the code regarding the letter definition, and it is transparent to the user (e.g b* instead of the previous b: ), where ":" notes a required argument after the letter (and no ":" or "*" notes no argument, mandatory)
Used for the h5dump binary option -b
It can be now
1)	-b (defaults to NATIVE)
2)	- b NATIVE
3)	- b FILE
4)	-b LE
5)	-b BE
Note: the keyword NATIVE replaces MEMORY
This feature (-b with no argument) was tested with the sequence of h5dump to binary (NATIVE) then h5import to generate an HDF5 file from the binary file and h5diff to compare the 2 HDF5 files
Tested: windows, linux

tools/testfiles/tnofilename.ddl

@@ -58,10 +58,10 @@ usage: h5dump [OPTIONS] file
         number of dimensions in the dataspace being queried
   U - is a URI reference (as defined in [IETF RFC 2396],
         updated by [IETF RFC 2732])
-  B - is the form of binary output: MEMORY for a memory type, FILE for the
+  B - is the form of binary output: NATIVE for a memory type, FILE for the
         file type, LE or BE for pre-existing little or big endian types.
         Must be used with -o (output file) and it is recommended that
-        -d (dataset) is used
+        -d (dataset) is used. B is an optional argument, defaults to NATIVE
   Q - is the sort index type. It can be "creation_order" or "name" (default)
   Z - is the sort order type. It can be "descending" or "ascending" (default)