Fixed links
ZUMO: added draft of new iOS client conceptual topic
ZUMO: many validation fixes
Merge pull request #1332 from mollybostic/master_0430

no staging required -- removed obsolete and broken links
ZUMO: fixed switcher in new iOS client topic
update 3 HDInsight articles
NO STAGING! fixed broken links in switcher code
Merge pull request #1334 from pennij/working_mon0513

NO STAGING! fixed broken links in switcher code
Updating CouchDB and Mongo articles per Molly
Typographical changes per Molly
Reworded the Solr tutorial
fixed broken toc links
Merge pull request #1335 from pennij/working_mon0513

fixed broken toc links
Updated Solr architectural diagram
NO STAGING deleted chunk from a chunk
Merge pull request #1337 from pennij/working_mon0513

NO STAGING deleted chunk from a chunk
Update multi-tier-with-storage-2-download-and-run.md

Removing references to Database Explorer per TFS 639771
Adding in IaaS or PaaS section
Update web-app-with-sql-azure.md

Removing references to Database Explorer (TFS 639771)
NO STAGING fixed broken link