Some useful improvements

[serenader2014]

Hello, I have added some useful feature to this theme:

• Support Google Analytics and Disqus, they're optional. you can choose to enable it or not.
• Adjust post page's author avatar style, using background-image instead of <img />, more flexible.(Because if the images's width and height are not the same, the image will look strange.)
• Improve post page's image style. Default style will break the page's view in the mobile broswer. I just simply add two rules: width: 100%;cursor:pointer . The later rule is for the blueimp gallery, this plugin support image gallery feature. I think this is a must have feature in the post page.