algs4partII-004/burrows: Implemented MoveToFront::encode.

Compilation:  PASSED
Style:        PASSED
Findbugs:     No potential bugs found.
API:          PASSED

Correctness:  0/23 tests passed
Memory:       10/10 tests passed
Timing:       78/78 tests passed

Aggregate score: 35.00% [Correctness: 65%, Memory: 10%, Timing: 25%, Style: 0%]