update released notes
add released date
modify docs
Update bee.md
Merge pull request #84 from vishalsodani/patch-1

Fix sentence structure and spelling
fix the doc error
Update Introduction.md
Merge pull request #85 from loongmxbt/patch-1

Update Introduction.md
Update usecases.md

下面那两个展示的企业网站，看着不怎么样，我新增个股票的数据查询。用beego开发的，上线一来基本没有出现个问题，已有34307多用户使用过。
Merge pull request #86 from liusongsen/master

添加一个股票展示的demo
Correct spelling of `healthcheck`
Merge pull request #87 from MasterXen/patch-1

Correct spelling of `healthcheck`
update LayoutSection wording
Merge pull request #88 from pengfei-xue/patch-2

update LayoutSection wording
update donate
Update usecases.md
Merge pull request #89 from linbaozhong/patch-2

Update usecases.md
capitalized Beego, rephrased some parts
fixed contributing.md
Merge pull request #90 from oserror/intro-fix

Intro fix