Add offline inference support

[classicsong]

Add support for offline inference of two different tasks:

• The Linkage Score Ranking
• The Embedding Similarity Ranking

For linkage score ranking, we support TransE_l1, TransE_l1, DistMult, ComplEx, RESCAL, RotatE score functions. We provides two different score funcs:

• none: $score = x$
• logsigmoid: $score = log(sigmoid(x))$

For embedding similarity ranking, we support five different similarity funcs:

• cosine: score = $\frac{x \cdot y}{||x||_2||y||_2}$
• l2: score = $||x - y||_2$
• l1: score = $||x - y||_1$
• dot: score = $x \cdot y$
• extended jaccard: score = $\frac{x \cdot y}{||x||{2}^{2} + ||y||{2}^{2} - x \cdot y}$

• [x] linkage score ranking inference
• [x] embedding similarity ranking inference
• [x] docs
• [x] unitest
• [x] examples