Merge pull request #623 from Qwinix/master

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

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

commit - minor
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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