[issue23] Alteration to section 3.1 to clarify key states
[issue23] Change of wording when talking about DNSKEY & associated data

The text originally said "DNSSEC validation requires two pieces of
information".  This is incorrect as validing an RR requires the
RRset, the RRSIG and the DNSKEY.  This has been altered.
[master] Merge branch 'issue23'
[master] Changes to the wording in the "Key States" section

Restored the comment about securing the pool that got lost in the
merge of issue23.  Updated the "Ready" state wording with John
Dickinson's suggestion.