add save all images from rss

git-svn-id: https://svn/IT/az/groovy@23622 99cadc30-3bf9-11df-9bc1-510916f65ae8
make more sophistical file naming

git-svn-id: https://svn/IT/az/groovy@23623 99cadc30-3bf9-11df-9bc1-510916f65ae8
get extensions from url mime type

git-svn-id: https://svn/IT/az/groovy@23624 99cadc30-3bf9-11df-9bc1-510916f65ae8
Merge remote-tracking branch 'remotes/git-svn'