adding Bminer - a faster Equihash miner
[Bminer: When Crypto-mining Made Fast](https://www.bminer.me/)
[Bitcoin Forum thread](https://bitcointalk.org/index.php?topic=2519271.0)

I know it has a bad reputation, and a closed source, but with the new version I'am having ~2,5% improvement compared to EWBF (fastest miner in my case).

With my 3x 1080 Ti, 3x 1070 Ti RIG, I have:
- 3,85 KH/s with EWBF (3,81 KH/s with DSTM after removing 2% dev fee)
- 3,95 KH/s with Bminer (after removing 2% dev fee)

Probably longer tests required to check these numbers on pool as well.

Edit 1.:
Snapshot from Mining Pool Hub looks OK:
![image](https://user-images.githubusercontent.com/1230402/40132559-66e55740-593d-11e8-890f-9cf355570c59.png)