Some test cases for saving scenarios, and fix some bugs they revealed

- Fix variable town entry and saved item rects not being saved if they referenced an invalid town
- Fix "blank" scenario timers being saved
- Fix junk data appearing in timers
- Output operators for location and rectangle types
- Set timer node_type to 2 when loading from town record

.gitignore

@@ -66,5 +66,10 @@ src/doxy/doxy_warnings.txt
 # Windows junk files
 Thumbs.db
 
+# Test case junk files
+test/junk/*.xml
+test/junk/*.spec
+test/junk/*.map
+
 # Misc
 oldstructs.txt