some new basic arbology tree+pattern test files

examples2/tree/aarbology.test4.pattern.xml

+<?xml version="1.0"?>
+<RankedPattern>
+  <subtreeWildcard>
+    <RankedSymbol>
+      <SubtreeWildcardSymbol/>
+      <Unsigned>0</Unsigned>
+    </RankedSymbol>
+  </subtreeWildcard>
+  <alphabet>
+    <RankedSymbol>
+      <String ref="0">CEE_ADD</String>
+      <Unsigned>2</Unsigned>
+    </RankedSymbol>
+    <RankedSymbol>
+      <String ref="1">OP_ICONST</String>
+      <Unsigned>0</Unsigned>
+    </RankedSymbol>
+    <RankedSymbol>
+      <SubtreeWildcardSymbol/>
+      <Unsigned>0</Unsigned>
+    </RankedSymbol>
+  </alphabet>
+  <content>
+    <RankedSymbol>
+      <Ref id="0"/>
+      <Unsigned>2</Unsigned>
+    </RankedSymbol>
+    <Children>
+      <RankedSymbol>
+        <SubtreeWildcardSymbol/>
+        <Unsigned>0</Unsigned>
+      </RankedSymbol>
+      <RankedSymbol>
+        <Ref id="1"/>
+        <Unsigned>0</Unsigned>
+      </RankedSymbol>
+    </Children>
+  </content>
+</RankedPattern>