a file upload library for zepto
Zepto.ajaxFileUpload(setttings);
the settings is the parameters for upload, except for the default settings from Zepto, the follow elements is required
String fileElementId: the id of the input element which will be upload
Array data: the data will be upload, the array's element is Object, key => value to be upload
A blog about this in Chinese: https://blog.acrazing.me/post/ajax-file-upload.html (I'm so sorry)