debian/source.filter: more files to ignore
fixing lintian warning 'unused-override'

libtheora is no longer used
fixing lintian warning 'jar-not-in-usr-share'

The *.jar files in iceowl-extension are not Java related files, instead
these are zip archives.
fixing lintian warning 'image-file-in-usr-lib'

Moving the non platform related files in /u/l/i-e/chrome/{icons,skin} to
/u/s/i-e/chrome/{icons,skin}.
fixing lintian error 'source-is-missing'

The complained error about the missing source of atoms.js is related to
th minified JS file from the Selenium project. Dropping this message due
Selenium is not yet packaged inside Debian.