work towards a clean compile on migrating set and get variables from Tag.

__include.cpp

@@ -10,8 +10,7 @@ namespace jet {
       if(hasContainer)
 	throw coreutils::Exception("include tag should not have a container.");
       hasContainer = true;
-      resolveKeyword("file");
-      coreutils::File file(keywords["file"]);
+      coreutils::File file(keywords[resolveKeyword("file")]);
       file.read();
       container = file.asZString();
       try {