Improving Images of Featured Speakers

[mohitm15]

• [x] Included a Preview link and screenshot showing after and before the changes.
• [x] Included a description of the change below.
• [x] Squashed the commits.

Changes done in this Pull Request

Qualities of the images of the featured speakers have been improved and structured accordingly.

• Preview Link
• Fixes #117

Description / Changes

Qualities of the images of the featured speakers have been improved and structured accordingly. Screenshots have been attached to preview. Some of the mailing links were also corrected.Some images were added of some of the speakers as saved with their names with sufffix 1.

Screenshots if any:

Before:

After:

Img 1

Img 2

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