SpecIndex.GetAll* functions inconsistent - make consistent with GetAllSchemas.

[crunk1]

GetAllSchemas returns references to schemas from components, inlined schemas, and $ref schemas.

Most of the other GetAll* functions only return references to components, like GetAllRequestBodies, for example:

GetAllRequestBodies will return all requestBodies found in the document (under components)

So GetAllRequestBodies won't return inlined or $ref request bodies.

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Tangentially, the GetAllSchemas function doc is a little confusing. It says schemas come in the order inlined, components, refs. But then it says sorted by line number.

Also, thank you for your great libraries. :)