entailment review - part 1

I am still catching up with Entailment and didn't complete the whole review in time...
... so, attached part 1, which essentially goes up to RDFS entailment only, didn't have 
time yet to take a closer look to the OWL parts.

None of my comments should really hold up publication, I think the document is overall in 
very good shape. 

However, actually some of my questions (comment 6) and 9) ) refer to the definitions taken from the current 
query spec and might need further rethinking/discussion of those.

Details in the attached file.