[Dcmlib] gdcmrewrite activated !

[Mathieu Malaterre]

gdcmrewrite is now available from the current svn version. For now it
will only do:

- If Group Length is present, the length is garantee to be correct
- If Element with Group Tag 0x1, 0x3, 0x5 or 0x7 are present they are
simply discarded (not written).
- Elements are written in alphabetical order
- 32bits VR have the residue bytes sets to 0x0,0x0
- Same goes from Item Length end delimitor, sets to 0x0,0x0

http://sourceforge.net/projects/gdcm/
-> http://sourceforge.net/forum/forum.php?forum_id=603664

-- 
Mathieu