Merge pull request #5 from pidanzhou/master

修改header中RSS链接为绝对路径
一些小调整,部份config改为UserConfig,其实config的内容在UserConfig中全部有.
archive页面美化(/标签/分类/归档页面)
Merge branch 'master' of github.com:pidanzhou/hexo-theme-chenall into rimo