remove update description from config as this is supposed to be provided by addons.opera.com
initial Opera 15: copy over /app of https://github.com/shybyte/tos-checker @ 3b1d9f2526b20f23d64aaf6fa78f58f11860d867
remove notifications code and permission as Opera doesn't support this API
update version and description
add more permissions. got error when uploading. found them in automatically converted version from Opera 12 ext.
update screenshot to Opera 15 version