Store talk node type in scenario file as enumerator instead of numer

- Also, don't write empty CDATA sections when dialogue name/look/job sections are completely empty.

rsrc/schemas/dialogue.xsd

@@ -47,7 +47,7 @@
 		<xs:complexType>
 			<xs:sequence>
 				<xs:element name="keyword" minOccurs="1" maxOccurs="2" type="xs:string"/>
-				<xs:element name="type" type="xs:integer"/>
+				<xs:element name="type" type="xs:token"/>
 				<xs:element name="param" minOccurs="0" maxOccurs="4" type="xs:integer"/>
 				<xs:element name="text" minOccurs="1" maxOccurs="2" type="xs:string"/>
 			</xs:sequence>

rsrc/schemas/scenario.xsd

@@ -167,7 +167,7 @@
 							<xs:element name='description' type='xs:string'/>
 							<xs:element name='node' type='xs:integer'/>
 							<xs:element name='quantity' type='shop-amount'/>
-							<xs:element name='cost' type='xs:integer' minOccurs="0"/>
+							<xs:element name='cost' type='xs:integer'/>
 							<xs:element name='icon' type='xs:integer'/>
 						</xs:all>
 					</xs:complexType>

rsrc/schemas/town.xsd

@@ -139,7 +139,7 @@
 							</xs:simpleContent>
 						</xs:complexType>
 					</xs:element>
-					<xs:element name="item">
+					<xs:element name="item" minOccurs="0">
 						<xs:complexType>
 							<xs:all>
 								<xs:element name="type" type="xs:integer"/>
@@ -152,7 +152,7 @@
 							<xs:attribute name="id" type="xs:integer"/>
 						</xs:complexType>
 					</xs:element>
-					<xs:element name="creature">
+					<xs:element name="creature" minOccurs="0">
 						<xs:complexType>
 							<xs:all>
 								<xs:element name="type" type="xs:integer"/>