Merge branch 'add_migration_command' into 'master'

Add db migration scripts to installed commands

See merge request !70

setup.py

@@ -59,6 +59,7 @@ setup(
     entry_points={
         "console_scripts": [
             "worker = beat.core.scripts.worker:main",
+            "migrate_db_to_v2 = beat.core.scripts.migrate_db_to_v2:main",
             "bcpworker = beat.core.bcp.worker:main",
             "bcpbroker = beat.core.bcp.broker:main",
         ]