Merge pull request #6 from pengzhanlee/dev

Dev
Merge pull request #8 from pengzhanlee/dev

case add
case list
Merge branch 'dev' of https://github.com/techird/baidu-fe-site into dev
add preview.png for dev
gmu and chassis case
Merge branch 'dev' of https://github.com/techird/baidu-fe-site into dev
Merge pull request #9 from pengzhanlee/dev

bugfix
Merge branch 'dev' of https://github.com/techird/baidu-fe-site into dev
remove thumbs.db
add thumbs ignore
Merge pull request #10 from karynsong/dev

Dev
case list style
Merge branch 'dev' of https://github.com/techird/baidu-fe-site into dev
bugfix