Make installing Oxygen icons optional The new CMake option -DWITH_OXYGEN=(ON|OFF|AUTO) now controls whether the Oxygen icons Quassel uses are to be installed. If AUTO (the default) is selected, icons will not be installed iff KDE > 4.3.0 is present and enabled, because we can then expect them to be present in the system theme. Also updated the importer script and docs accordingly.
Deuglify channel state icons Thanks to Daniel "billie" Pielmeier for providing suitable icons!