fix title bug

package.json

@@ -24,6 +24,7 @@
     "generator"
   ],
   "author": "qingwei-li <cinwell.li@gmail.com> (https://github.com/QingWei-Li)",
+  "homepage": "https://QingWei-Li.github.io/docsify",
   "license": "MIT",
   "devDependencies": {
     "eslint": "^3.10.2",

src/docsify.js

@@ -12,8 +12,10 @@ class Docsify {
   constructor (opts) {
     Docsify.installed = true
 
-    this.replace = true
     this.opts = Object.assign({}, opts, DEFAULT_OPTS)
+    this.opts.title = (this.opts.title ? this.opts.sep : '') + this.opts.title
+
+    this.replace = true
     this.dom = document.querySelector(this.opts.el)
     if (!this.dom) {
       this.dom = document.body