Initial implementations of byte/word/dword/order1 smokers

The full list of smells (speeds measured on the single core of i7-4770):

• ByteSmoker: computes entropy of individual bytes (2 GB/s).
• WordSmoker: computes entropy of 16-bit words (0.7-1.5 GB/s).
• DWordSmoker: computes entropy of 32-bit dwords (3 GB/s).
• Order1Smoker: computes order-1 entropy of 8-bit bytes (0.7-1.5 GB/s).

And examples of their work:

Text file (enwik9):

• ByteSmoker entropy: minimum 62.68%, average 64.20%, maximum 66.97%
• WordSmoker entropy: minimum 53.14%, average 55.97%, maximum 57.93%
• Order1Smoker entropy: minimum 42.43%, average 47.75%, maximum 48.88%
• DWordSmoker entropy: minimum 4.14%, average 10.37%, maximum 16.01%

Binary file:

• ByteSmoker entropy: minimum 48.49%, average 77.67%, maximum 93.62%
• WordSmoker entropy: minimum 33.09%, average 68.74%, maximum 92.00%
• Order1Smoker entropy: minimum 17.69%, average 59.81%, maximum 90.39%
• DWordSmoker entropy: minimum 1.78%, average 31.92%, maximum 92.00%

Compressed file:

• ByteSmoker entropy: minimum 100.00%, average 100.00%, maximum 100.00%
• WordSmoker entropy: minimum 99.75%, average 99.93%, maximum 99.93%
• Order1Smoker entropy: minimum 99.49%, average 99.86%, maximum 99.86%
• DWordSmoker entropy: minimum 96.20%, average 96.95%, maximum 98.04%