NIHVIVO-1445 modify all "javac" steps in the build script to enforce UTF-8 interpretation of the source files, instead of letting it default to whatever the OS decides.

webapp/product-build.xml

@@ -142,6 +142,7 @@
 		       destdir="${product.classes.dir}"
 		       debug="true"
 		       deprecation="true"
+		       encoding="UTF8"
 		       optimize="true"
 		       source="1.6">
 			<classpath>
@@ -170,6 +171,7 @@
 		       destdir="${test-classes.dir}"
 		       debug="true"
 		       deprecation="true"
+		       encoding="UTF8"
 		       optimize="false"
 		       source="1.6">
 			<classpath refid="test.compile.classpath" />