JlsBssmnn

implement BatchBALD and LAL-RL strategy

1

I wrote my bachelor thesis about Active Learning Query Strategies. As a part of the thesis I implemented the two strategies [BatchBALD](https://arxiv.org/abs/1906.08158v1) and [LAL-RL](https://arxiv.org/abs/1810.04114) for ALiPy. To verify the correctness...