ENH: Update pydicom from 0.9.8 to 0.9.9

The main reason is that 0.9.8 fails to load files that have special characters in their name.

0.9.9 doesn't need patching of setup.py anymore (in 0.9.8, first 3 lines of setup.py had to be removed to avoid loading some old dependencies).

From: Andras Lasso <lasso@queensu.ca>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@25607 3bd1e089-480b-0410-8dfb-8563597acbee