Front page improvements

[sgerbino]

Resolves #69. Resolves #55. Resolves #67. Resolves #63. Resolves #17. Resolves #78.

Brief description

New components:

• Community
• Ecosystem highlights
• Token allocation

Refactored components:

• Where to get KOIN
• The Koinos Advantage

Mobile changes:

• Add spacing to hero and top navigation bar
• Hide partnerships on mobile version

This PR will aim to improve the frontpage with feature sections leading to the additional pages being created in other PRs.

Checklist

• [x] I have built this pull request locally
• [ ] I have ran the unit tests locally
• [x] I have manually tested this pull request
• [x] I have reviewed my pull request
• [ ] I have added any relevant tests

Demonstration

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[brklyn8900]

On mobile the News & Updates section images are stacked one after the other. They should stack above the associated post title and summary.

[mvandeberg]

The newly added sections are not centered on mobile, which does not match the rest of the site.

Examples:

Elsewhere:

[sgerbino]

The newly added sections are not centered on mobile, which does not match the rest of the site.

Examples:

Elsewhere:

This is how the template is designed.