#7 Missing support for Ds and Rg

[Egon Willighagen]

The schema 2.5 lacks support for the new elements Ds (Darmstadtium) and Rg (Roentgenium). Below is the (trivial) patch. See also:

http://environmentalchemistry.com/yogi/periodic/Rg.html
http://environmentalchemistry.com/yogi/periodic/Ds.html

--- src/org/openscience/cdk/io/cml/data/cml25b1.xsd (revision 8554)
+++ src/org/openscience/cdk/io/cml/data/cml25b1.xsd (working copy)
@@ -544,6 +544,7 @@
<xsd:enumeration value="Cs"/>
<xsd:enumeration value="Cu"/>
<xsd:enumeration value="Db"/>
+ <xsd:enumeration value="Ds"/>
<xsd:enumeration value="Dy"/>
<xsd:enumeration value="Er"/>
<xsd:enumeration value="Es"/>
@@ -606,6 +607,7 @@
<xsd:enumeration value="Rb"/>
<xsd:enumeration value="Re"/>
<xsd:enumeration value="Rf"/>
+ <xsd:enumeration value="Rg"/>
<xsd:enumeration value="Rh"/>
<xsd:enumeration value="Rn"/>
<xsd:enumeration value="Ru"/>