RawGit is shutting down, replace it with jsDelivr

in favor of new gitbook doc.

New resource UML pic

(not done: the ongoing discussion of services vs work)

added note about quantity 0 resources

For discussion, not looking for merge necessarily, although it probably reflects where we are at better than the existing one. This is mostly an attempt to document what we have thus far.   I'd like a reading on what are our remaining issues on vf:Resource, and/or issues with this model.  And I do expect there is still some discussion on what I have here. :)

added VF Ontology as example

Add amount and amountAvailable

first two YAML snippets with examples

Added tentative Location

oops, this is temporary

This PR is to record some discussion on Location.

How do we want to treat Location?  I'm thinking we just reference an existing vocabulary's term, but haven't researched what we can use.  

This model shows that Location is different than Resource.

Location would need to be definable by the users to the level of detail they would need.  For example: SW corner of elf's basement.

Discussion?  Disagreement?

change name of uml.png to resource.png

Upgrade to resource UML per gitter chats

Open issue: how to model Location within the scope of VF.  Suggest link called vf:currentLocation to some class from an existing vocab that we need to figure out.

Also renamed file, will fix in .md and add to PR.

added section on stock vs flow

Please see a) if this makes sense and b) if you agree!!

Added section on resource behavior and identification

Please see if this section makes sense.  (Pulled some of it from Bob's writeup in issues.)  I also did a bit of other tweaking.

still in process

added vf:

I fixed it up for vf: namespace.  Just to note, I'm not set on any of these names.  Especially I think there will be discussion on ResourceType and its subclasses.  Just getting straw dog out there while I was thinking about it.