Readme and complete workflow redone to include Docker

I have created a Docker image that can execute the Complete Workflow example (~~Two things~~ One thing not tested at present, ~~running the parallel mark duplicate script since it used way to much memory on my computer and~~ it does not do Single Copy Gene evaluation because of PROKKA / Prodigal debate).

If you have Docker installed, please try the image, binnisb/concoct_0.2.1_full.