new Silac labeling method K8R10

src/resources/catalog_label.xml

@@ -13,4 +13,14 @@
     		<mod at="K" value="36.0" acc="MOD:00638"/>
     	</isotope_label>
     </isotope_label_list>
+    <isotope_label_list id="Silac_K8R10">
+        <isotope_label id="heavy">
+    		<mod at="R" value="10.01" acc="MOD:00587"/>
+    		<mod at="K" value="8.01" acc="MOD:00582"/>
+    	</isotope_label>
+        <isotope_label id="inter">
+    		<mod at="R" value="6.02" acc="MOD:01331"/>
+    		<mod at="K" value="4.01" acc="MOD:00942"/>
+    	</isotope_label>
+    </isotope_label_list>
 </catalog>