ByteArray impl for StreamedContent

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11523 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Minor fix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11524 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Bugfix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@11525 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c