message: Add mixed mesh sample run for lor-transfer
diff: // lor-transfer -h1
  // lor-transfer -t
  // lor-transfer -m ../../data/star-q2.mesh -lref 5 -p 4
  +// lor-transfer -m ../../data/star-mixed.mesh -lref 3 -p 2
  // lor-transfer -lref 4 -o 4 -lo 0 -p 1
  // lor-transfer -lref 5 -o 4 -lo 0 -p 1
  // lor-transfer -lref 5 -o 4 -lo 3 -p 2
  