Fill home page with more info.

[hanyuancheung]

• I've noticed that home page still have many blanks, try to fill it to make it filled.
• Add more info about our team, not just an email in readme.
• Finish one more basic blogs for each one with @zhyChesterCheung @Rocksnake , not limited to the introduction of the site, self-introduction, personal tech-stack...