Add fileRemoved, elaborate on filesSubmitted.
Add fileRemoved, elaborate on filesSubmitted.

Add fileRemoved.
Elaborate on filesSubmitted to note that since it happens after the file is added to the upload queue, invoking flow.upload() will upload the files in the list.

flowjs/flow.js,flowjs/flow.js,manoj-nama/flowplus,Symplicity/flow.js,SuberFu/flow.js,SuberFu/flow.js,manoj-nama/flowplus