Add hitokoto and beian options with some optimizations

[prnake]

1. Add optional configurations:

beian: 'ICP备XXX号'
startYear: 2019
hitokoto: 
    enable: true
    api: https://v1.hitokoto.cn/?max_length=15
truncate_len: 160

2. Optimize article preview content
3. Optimize updateSidebar, in some case resize window will not update $('#main-container').outerWidth() immediately, trigger $('#main-container') first to update $('#main-container').outerWidth().