Add PTVS 2.1 tutorials
Add missing word in create project instruction.
Add new PTVS 2.1 cloud service documentation
Fix tags
Fix tags and properties
Title adjustment for consistency with other PTVS 2.1 docs
Add prerequisites section
Fix download links
Merge branch 'master' of https://github.com/Azure/azure-content into ptvs21
Updated TOC and anchors
Add images alt text and made the links to images inline
Renamed files for new PTVS 2.1 web sites articles.
Add cross-refs between new PTVS articles
Add reference to Websites from Cloud Service article (python).
Merge pull request #2135 from huguesv/ptvs21

New articles for PTVS 2.1 release (python)