Updated versioning info and added filename specification info
Update devGuide/en/chapters/13-marketplace.markdown

Wordsmith Marketplace version update
Update devGuide/en/chapters/13-marketplace.markdown

Format Marketplace versioning update
Update devGuide/en/chapters/13-marketplace.markdown

Adjusted example app WAR name
Merge pull request #366 from jhinkey/marketplace-version-updates

Dev Guide Marketplace version updates