Build reference inside docker container

[nsyzrantsev]

The user does not always have all the tools, or his/her OS does not support these tools that are used in build_ref.sh. I think reference building should be done inside the docker container — this is necessary for reproducibility of the results.

[nsyzrantsev]

And I think we should rewrite these build_ref.sh scripts to the python scripts, because it is very difficult to catch errors inside bash.

To do:

• Create a container to generate a vidjil reference #99
• Create a container to generate an archive with olga models #100
• IgBlast reference with only major allele does not correct #68