Merge pull request #309 from Munter/master

Removed link to old documentation. Was a 404 in the current build
Update index.md

Update yeoman-generator version following https://github.com/yeoman/yeoman/issues/1395
Merge pull request #310 from WitteStier/patch-1

Update index.md
Remove grammar and punctuation mistakes
Merge pull request #313 from nimamehanian/patch-1

Remove grammar and punctuation mistakes
Include atom feed link on all pages, not just blog pages