Implement #38: add function to mark user as a spammer. Display only active members on member list. Display login form as table (not sure why wasn't doing this before).

#downloads-search {
   text-align: center;
}
#downloads-add td {
    padding-bottom: 5px;
}

#downloads-add fieldset {
    margin: 1em 0 1em;
    padding: 0.5em;
}