简单整理sidebar，没整完并且排版有bug（表格） - #120

Changed pages include:

• index.html - view
• 404.html - view
• faq.html - view
• managementcommittee.html - view
• about.html - view
• contribute.html - view
• history-river.html - view
• how-to-join-server.html - view
• intro.html - view
• news.html - view

There are more changes not included in the list