Merge pull request #503 from Qwinix/master

Fixed - Incorrect Button #502
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Merge pull request #504 from SatishTalim/master

commit -minor
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Merge pull request #505 from SatishTalim/master

commit - blog post
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Merge pull request #506 from SatishTalim/master

commit - minor
Add Anubhav Sinha as speaker #303
Merge pull request #308 from Qwinix/issue_303

Add Anubhav Sinha as speaker #303