change co-fs to fs

[dreamllq]

because co-fs not support async await, all the file controller is not work. so now use var fs = require('fs'); var stat = fs.statSync(filepath); replace var fs = require('co-fs'); var stat = await fs.stat(filepath);

[coveralls]

Coverage remained the same at 28.863% when pulling 11d4778e57c27028c258d1733923be1717e6e20c on dreamllq:master into 89cf6aed3e7858e642fcbf1197218f598bd1ccf7 on node-webot:master.

[JacksonTian]

通过 mz/fs 而不是 fs.*Sync 方法。新版本已经发布 。

[dreamllq]

谢谢