Seed empty folder for Texture

[obuchtala]

This will be implemented in Texture but we record it here, as we use Texture as an initial dot adoption environment.

.dot/
  main.log
manifest.xml (Manifest)
document.xml (JATS4M)
entities.json (EntityDB)
assets/ (Folder)

with main.log looking like so:

V0
<time> <user> manifest <change for creating document.xml entry>
<time> <user> manifest <change for creating entities.json entry>
<time> <user> manifest <change for creating assets entry>
<time> <user> <uuid for document.xml> <initial changes for document.xml>
<time> <user> <uuid for entities.json> <initial changes for entities.json>
V1

Notes:

• every entry in the log has a timestamp and a user-id
• the third column is the id of the changed resource
• there is a built-in resource called manifest, which has a special schema, and is used to
  add and remove resources
• the change is stored after the resource-id and can be custom to the specific resource type, e.g. for manifest it is always a serialized ObjectOperation; for other document.xml it is an array of serialized operations; for entities.json it is an array of serialized ObjectOperations