fix conf.json issues

- don't try to create conf.json if it doesn't exist (resolves a
permissions issue when installing with npm -g)
- add default values for recently added properties (hopefully fixes
Travis CI build)

conf.json.EXAMPLE

@@ -7,5 +7,10 @@
         "excludePattern": "(^|\\/|\\\\)_"
     },
     "plugins": [],
+    "templates": {
+        "docletFormat": "taffydb",
+        "cleverLinks": false,
+        "monospaceLinks": false
+    },
     "jsVersion": 180
 }

jsdoc.js

@@ -310,13 +310,12 @@ function main() {
     env.opts = jsdoc.opts.args.parse(env.args);
 
     try {
-        env.conf = new Config( fs.readFileSync( env.opts.configure || env.dirname + '/conf.json' ) ).get();
+        env.conf = new Config( fs.readFileSync( path.join(env.opts.configure || env.dirname, 'conf.json') ) ).get();
     }
     catch (e) {
         try {
-            //Try to copy over the example conf
-            var example = fs.readFileSync(env.dirname + '/conf.json.EXAMPLE', 'utf8');
-            fs.writeFileSync(env.dirname + '/conf.json', example, 'utf8');
+            // Use the example file if possible
+            var example = fs.readFileSync(path.join(env.dirname, 'conf.json.EXAMPLE'), 'utf8');
             env.conf = JSON.parse(example);
         }
         catch(e) {