Workaround a problem in couchdb.

In some cases (compactation, db reset) the update to a document which
has previously existed can be silently ignored. This makes feat fail
at to start up.

The bug in couchdb is:
https://issues.apache.org/jira/browse/COUCHDB-1415
Add 2 commands to feat-service: pushinitialdata and migrate.

These command glue the feat-dbload functionality and the agency config,
thus the database configuration is read from /etc and all the
configured application are loaded.

Conflicts:

	bin/feat-service
Add a service command to delete all the descriptors from the database
regardless of their type.

This is usefull for the reset script.