+2004-01-31 Jean-Pierre Roux
+ * FIX gdcmParser::WriteEntries : when a VR is tagged as 'Unknown'
+ no longer writes 'Un' on disk
+ * FIX SQ elements with actual length are now dealt with corectly
+ * FIX gdcmFile::WriteBase make the difference, for color images, between
+ the length (for Palette expanded omages)
+ and Raw Length (non expanded image + Palette)
+ * FIX Dicts/dicomV3.dic : removal of 'CTX' (context dependant) VR
+ (that broke Write). Replaced by UL.
+ Aware user will reload the field if he
+ thinks it's necesssary
+