Supported to copy code

[ddalpange]

HighlightJS does not support to copy code, so it was created by myself.

plugins:
    clipboard: true

[ppoffice]

@ddalpange Good job! However, the top right corner is already occupied by the optional link if the user uses the following code block format as it's shown in https://blog.zhangruipeng.me/hexo-theme-minos/Using-Hexo-Tag-Plugins-in-Minos/#Code-Block

{% codeblock _.compact http://underscorejs.org/#compact Underscore.js %}
_.compact([0, 1, false, 2, '', 3]);
=> [1, 2, 3]
{% endcodeblock %}

Could you please place the copy button somewhere else? Also, please update the _config.yml.example so others know how to enable it.

[ddalpange]

I changed the code by your feedback :)