上传文件到bcs的处理器

[BcsUploaderProcessor #266](https://github.com/ecomfe/edp/issues/266)
参考其它processor的写法，改成这样子：

```javascript
options = edp.util.mixin({
    files: [ '*.js', '*.css', '*.less' ],
    concurrent: 5,
    maxSize: 10 * 1024 * 1024,
    autoUri: false
}, options);

AbstractProcessor.call( this, options );
```