Draft of stand-alone actorstore

[persquare]

I've pushed a new branch (newstore) as a proof-of-concept how the ActorStore could be made into a completely stand-alone service.
The store is in newstore.py and a small REST service is in store_app.py. To use, start the service using FLASK_APP=store_app.py flask run --port 4999.

• When requested, the store responds with source and metadata for actors.
• The actor instantiation is completely different, see actormanager.py.
• Actor docstrings needs to be changed, see std.Identity, std.CountTimer, and io.Print, to use YAML syntax.
• Only apps using the above actors can run at present ;)
• No support for default argument values in actors, need to supply them all.
• Port property statements are ignored at present.
• Requirements should probably also move to the actor docstring.

Let me know what you think.

/Per

[persquare]

Functionality now in the calvin-3 branch