scale out with multiple azure storage accounts
English editing.
adding paragraph about scale units
update
clarify on multiple storage accounts
English editing.
updated visual
Minor editing.
updated image reference
use new content structure
updated to .png and added visio
Fixed note
updated menu with article
Merge pull request #430 from Particular/articles/issue-361-azure-multiple-storage-accounts-for-scaleout

scale out with multiple azure storage accounts