Fix bugs/omissions in $DEPEND lines
Remove pidfile cruft from minecraft-common ebuild

The init script has code for it, and does so more correctly.
Attempt to instill some sanity in minecraft-common

  - Add a minecraft-server user/group
  - Kill games.eclass with fire
  - Install the initscript properly instead of pointless copying
  - Added a big warning that it'll break for users of the previous version
    without manual intervention.
Fix kmscon ebuild, per comments from @hasufell

Compile-tested and repoman clean