Added dragdropSupport, previewWidth and previewHeight options for fileupload.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9551 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Added autoupload support.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9552 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c