Update contrib/debian.

* Updates package description to note that blockchain now takes
  2+ GB instead of 150+ MB.

* Stop creating DB_CONFIG with DB_LOG_AUTO_REMOVE as that is set
  in Bitcoin itself now.

* Update changelog with 0.6.2 and the current updates.

contrib/debian/bitcoin-qt.install

@@ -1,5 +1,4 @@
-debian/bin/bitcoin-qt usr/bin
-bitcoin-qt usr/lib/bitcoin
+bitcoin-qt usr/bin
 share/pixmaps/bitcoin32.xpm usr/share/pixmaps
 share/pixmaps/bitcoin80.xpm usr/share/pixmaps
 debian/bitcoin-qt.desktop usr/share/applications