Fixed PDBWW-4849. If invalid elements are found, they are ignored in the metal interaction search (example Deuterium in 4G0C).

git-svn-id: file:///home/svn-repositories/biojava/RCSB Viewers/trunk@10015 7c6358e6-4a41-0410-a743-a5b2a554c398
Fixed PDBWW-4849. Added Deuterium to enable element lookup, for example for 4G0C.

git-svn-id: file:///home/svn-repositories/biojava/RCSB Viewers/trunk@10016 7c6358e6-4a41-0410-a743-a5b2a554c398