Merge pull request #623 from Qwinix/master

Added David Calavera as a Speaker #621
commit
Merge pull request #624 from SatishTalim/master

commit - minor
commit
Merge pull request #625 from SatishTalim/master

commit - minor
commit
Merge pull request #628 from SatishTalim/master

commit - blog post
Add Baiju Muthukadan as a Speaker #416
Merge pull request #417 from Qwinix/issue_416

Add Baiju Muthukadan as a Speaker #416
Merge pull request #418 from Qwinix/master

Add Baiju Muthukadan as a Speaker #416