Add prefix results for doc2vec (cont.)

|------|:------------|

| 0.7604 | prefix, phrases=2, alpha=0.1, dm=0, dm-concat=1, epochs=5, hs=0, min-alpha=0, min-count=5, negative=12, vector-size=300, window=8 |

| 0.7579 | prefix, phrases=2, alpha=0.05, dm=1, dm-concat=1, epochs=5, hs=1, min-alpha=0, min-count=5, vector-size=400, window=4 |

| 0.7579 | prefix, phrases=0, alpha=0.05, dm=1, dm-concat=1, epochs=5, hs=1, min-alpha=0, min-count=5, vector-size=300, window=6 |

| *0.7578* | *random* |

| 0.7578 | prefix, phrases=0, alpha=0.05, dm=1, dm-concat=1, epochs=5, hs=1, min-alpha=0, min-count=5, vector-size=300, window=4 |

| 0.7578 | prefix, phrases=0, alpha=0.05, dm=1, dm-concat=1, epochs=5, hs=1, min-alpha=0, min-count=5, vector-size=300, window=5 |

| 0.7574 | prefix, phrases=0, alpha=0.05, dm=1, dm-concat=1, epochs=5, hs=1, min-alpha=0, min-count=5, vector-size=400, window=4 |

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