please review changelogs

I made sure every document had a "changes since proposed 
recommendation", even if the change was "None".   Several of them were 
not "None", though.

I expect these to be published in about 18 hours, so if you spot any 
problems let me know right now.

Copying from http://www.w3.org/TR/2013/REC-sparql11-overview-20130321/ 
to make some HTML email, we get:

//


        Set of Documents

This document is one of eleven SPARQL 1.1 Recommendations produced by 
the SPARQL Working Group <http://www.w3.org/2001/sw/DataAccess/>:

 1. SPARQL 1.1 Overview
    <http://www.w3.org/TR/2013/REC-sparql11-overview-20130321> (this
    document)
 2. SPARQL 1.1 Query Language
    <http://www.w3.org/TR/2013/REC-sparql11-query-20130321>
 3. SPARQL 1.1 Update
    <http://www.w3.org/TR/2013/REC-sparql11-update-20130321>
 4. SPARQL1.1 Service Description
    <http://www.w3.org/TR/2013/REC-sparql11-service-description-20130321>
 5. SPARQL 1.1 Federated Query
    <http://www.w3.org/TR/2013/REC-sparql11-federated-query-20130321>
 6. SPARQL 1.1 Query Results JSON Format (Second Edition)
    <http://www.w3.org/TR/2013/REC-sparql11-results-json-20130321>
 7. SPARQL 1.1 Query Results CSV and TSV Formats
    <http://www.w3.org/TR/2013/REC-sparql11-results-csv-tsv-20130321>
 8. SPARQL Query Results XML Format
    <http://www.w3.org/TR/2013/REC-rdf-sparql-XMLres-20130321>
 9. SPARQL 1.1 Entailment Regimes
    <http://www.w3.org/TR/2013/REC-sparql11-entailment-20130321>
10. SPARQL 1.1 Protocol
    <http://www.w3.org/TR/2013/REC-sparql11-protocol-20130321>
11. SPARQL 1.1 Graph Store HTTP Protocol
    <http://www.w3.org/TR/2013/REC-sparql11-http-rdf-update-20130321>


Thanks for all your amazing work over the past few years, folks.

        -- Sandro