Translate the .proto files to make connection work

[mkschulze]

To connect to the grakn server, we need the .proto files translated.

https://github.com/Humans-of-Julia/GraknClient.jl/tree/protoc-gen/src/generated

[mkschulze]

No need to translate them anymore, as we are going to use the files provided by Grakn and call them via PyCall.