import migrations and don't require diesel_cli for admins (#555)

* import migrations via macro

* panic on database not to the latest migration

* add subcommand to plm

* create migration that run tantivy index creation

* remove diesel_cli from places it was

* use our migration system for tests

* create table __diesel_schema_migrations if needed

script/generate_artifact.sh

@@ -1,6 +1,5 @@
 #!/bin/bash
 mkdir bin
 cp target/release/{plume,plm} bin
-cp "$(which diesel)" bin
 strip -s bin/*
 tar -cvzf plume.tar.gz bin/ static/ migrations/$FEATURES