* gdcmParser constructor has a new boolean param,'ignore_shadow',

* gdcmParser constructor has a new boolean param,'ignore_shadow',
             to allow skipping the shadow elements, to save memory space.
	     The TRUE value for this param has to be used
	     with a FALSE value for the 'enable_sequence' param.
	     ('public elements' may be embedded in 'shadow Sequences')

* gdcmHeader methods now deal with 'embedded icones images' in the header
             (even when an 'icone image sequence' is annouced by the
	     element (0x0088,0x0200), but there is NO icone at all ...

* gdcmHeader sometimes Image Location value doesn't follow
             the supposed processor endianity (see gdcmData/cr172241.dcm)

* gdcmHeader add the method
             IterHT  GetHeaderEntrySameNumber(grPixel,numPixel);
	     to get *all* the Header Entries with the same tag.
	     GetHeaderEntrySameName is probabely *useless*
	     (no meaning : Name is *not* an identifier within the Dictionnary)