Refresh the landing page

[adelavega]

I think it's time to refresh and simplify the landing page;

Suggested text:

A free and open platform for neuroimaging meta-analysis. [BOLD]
XXXX Studies, XXXX Activations [Autoupdating]

Perform custom neuroimaging meta-analyses entirely in the browser, and quickly get results in the cloud using automated analysis pipelines.

[Sign Up to get started] [Learn More (link to docs)]

Then below we can gave 3-4 cards below with show off specific elements:

(Alternatively, we can move up the steps that we already have, and maybe simplify it so that they can be easily seen upon landing)

[Find studies
 - Search across thousands of indexed neuroimaging studies, or import custom studies from PubMed and other sources
]

[Curate collection
 - Systematically select relevant studies, and track exclusion crteria using a PRISMA-compliant workflow]

[Specify & Execute Meta-analysis
- Choose from dozens of meta-analysis algorithms, and execute in the cloud or locally
- ]

[Share your results!
- Automatically upload results to NeuroVault for easy sharing and complete analysis provenance
- Comprehensive reports facilitate interpretation
]

I'm not sure we need the Studyset -> Study -> Analysis graphic on the front page, it's probably too complex and specific.

I would delete the Platform Comparison table or simplify it substantially, since it looks bad on mobile. At least we should remove Brainspell since that's not active. Maybe we can combine Neurosynth/NeuroVault since they are he same.

I would also delete the VBM column.

I suggest we delete "Neurosynth-Compose ecosystem" graphic, as its way too much detail for a front page.

[adelavega]

We can make the page keep scrolling for less crucial information. Some of it could be screenshots of the workflow, such as the curation workflow

Would be good to add a video in the long run as well

Having a Sponsors and Organization section with the logos of all the universities would be nice too. and the NIH logo.