Fix 使用stylus时报错

访问`.styl文件`时报错 edp `ERROR` Cannot read property **'compress'** of undefined

大概定位到 [/util/compile-and-write-stylus.js#L46](https://github.com/ecomfe/edp-webserver/blob/1.0.0-dev/lib/util/compile-and-write-stylus.js#L46)

在`.compress`和`.use`处添加了compileOptions 判断，解决问题!!!
Merge pull request #21 from acecode/stylusBugFix

Fix 使用stylus时报错