Closed a possible resource leak, updated README.md to point to DBO instead of Github's deprecated downloads section

src/com/massivecraft/factions/zcore/util/DiscUtil.java

@@ -94,6 +94,7 @@ public class DiscUtil
 			ReadableByteChannel rbc = Channels.newChannel(url.openStream());
 			FileOutputStream fos = new FileOutputStream(file);
 			fos.getChannel().transferFrom(rbc, 0, 1 << 24);
+			fos.close();
 			return true;
 		}
 		catch (Exception e)