Updated README.md

- 同步并格式化 Getting started 部分
- 链接 LICENSE 文件
Merge pull request #1 from liluo/dev

Updated README.md
Merge pull request #5 from tclh123/dev

Add setup_database & make web
Update default gunicorn worker number.
Add code guide link.
Change copyright year
Merge pull request #7 from ryaninhust/patch-1

迟到的新年快乐
refactor compute_relative_time
use new get code_dir method
Merge pull request #13 from dongweiming/modify_hooks_post_receive

use new get code_dir method
Merge pull request #11 from dongweiming/modify_compute_relative_time

refactor compute_relative_time
Fixed:

1. When mysql_config not installed
2. When virtualenv not installed
3. Bugfix: Setup database Access denied
Merge pull request #15 from dongweiming/modify_quick_start

Fixed:
Add Werkzeug.
Modify diff.py and remove duplicate code
Merge pull request #18 from dongweiming/modify_diff

Modify diff.py and remove duplicate code
Move repo to douban/code.
Add session.
Update user key index.
Add docutils.