Rename attributes 'resource*' to 'source*'

[lfourie]

Closes #38

[sslavic]

Have few somewhat related questions:

1. Does namespace identify event or event source (producer)?
2. If latter, what is the value namespace adds on top of source-id?
3. Is there a use case where events with same (event-type, event-type-version) can be published by more than one event source, so with difference in one of (source-id, source-type)?
4. If namespace identifies event source and there's value added of namespace on top of source-id would it make sense to include namespace together with (source-id, source-type) as property of source object?

[duglin]

@lfourie you'll need to sign your commit

[duglin]

@sslavic those are good questions. Can you open a separate issue to answer those since this one is just a syntax/word change and if it is merged quickly I don't want to forget to have a discussion about your questions?

[sslavic]

Created #41

[duglin]

@sslavic thanks!

[duglin]

@lfourie can you please sign your commit - I think we might be able to resolve this one quickly on the next call but we can't merge it unless its signed.

[duglin]

LGTM once signed

[sslavic]

@lfourie why close this one? It hasn't been merged. As @duglin suggested, before it can be merged, commit needs to be amended with sign-off info, as per contributing guidelines https://github.com/cloudevents/spec/blob/master/CONTRIBUTING.md#sign-your-work

[sslavic]

@lfourie just saw the #43 and that you added a comment there with sign-off info. If I'm not mistaken, sign-off info has to be in the git commit message itself, so once commit is merged sign-off remains in the repo.

[duglin]

@lfourie I reopened this one and fixed your DCO

[duglin]

LGTM

[ultrasaurus]

I like the change from resource => source. I think it is a lot clearer than original naming!

[deissnerk]

LGTM

[dklyle]

LGTM

[duglin]

Approved on Feb 1st call.
AI: Thomas to open issue to reconsider the name
AI: Thomas to work on new wording for definition of “source”