Added null redirects, quoted paths, disable user console logins.

Added some null redirects to quiet the script down. Quoted some
directory paths. Made created users have --disable-login

Changes:
 - scripts/AddBackupUser.sh
	2014/6/7	Added null redirects. Quoted some directory paths.
		Made created users --disable-login

 - scripts/SetupBackupServer
	2014/6/7	Added null redirects.