Fixed compiling issue

[frandlyn26]

I had trouble compiling. I was able to resolve by updating

1. turtlecoin-multi-hashing to turtlecoin-crypto in pool.js
2. updated docker file from 8-slim to 14-slim
3. in package.json change git to reflect turtlecoin-crypto so it would build the module.
4. in package.json had to manual put in the following info by replacing the "*" a. date format 4.5.1 b. redis 3.1.2