Tidy up widget XHTML

Close input tags
Change target _NEW to _BLANK
Add ALT to img tags
Add CDATA sections to scipts.
Changed name in FORM tag to be different, not allowed to have the same
"name" in XHMTL
Merge pull request #458 from ExolonDX/branch_28

Tidy up "picture" and "rss" widget XHTML