This commit adds dossier stack integration by doing two things:

1. Add a `dossier.web` Docker.
2. Modify the `memex-datawake-stream` code to insert feature collections
   into `dossier.store` whenever a {general,domain} entity is inserted.

Also, since `dossier.web` and `dossier.label` haven't been open sourced
yet, this commit contains a few hacks that will need to be refactored
before merging upstream.