Changes to Gitit User's Guide

• 2015-09-07 16:20:47 UTC (SonicYang): Fix links
• 2012-09-19 07:52:15 UTC (CrBoy): 中文化頁面標題並加上分類標籤
• 2012-09-06 15:18:24 UTC (Gitit): User's guide (README)