Distro comparisons -- added "free software" column
I added a new column in the distro comparisons: Software freedom status. It states whether a distro is free as in freedom, partly free or proprietary.
Also, I added random screenshots on the comparison screens.
Hope you like the changes. If you have any more ideas what should be included in the comparison table, please share it here. I still feel that the table is incomplete, but on the other hand I don't want it to be bloated (that's why I removed the "ISDN support" column some time ago since noone really uses ISDN anymore).