newznab - select href per .icon_nzb in #coverstable
Merge pull request #47 from jsterken/newznab_dupes

newznab - select href per .icon_nzb in #coverstable
Fixed #46.
Update changelog.txt
Preparation for 0.5.23
Improvement: Better looking icons, in particular in the action bar
Preparation for 0.5.23