Remove company logos from the home page. Fix #1340
Replace the carousel with a single image
Add view of tracks for the home page
Render the new track cards for the home page
Add tagline and button to start the first project
Add back is_onboarding to projects
Change link on the home page to go to the onboarding project
Lead the user to a project's first introduction steps
Merge pull request #1344 from teamleada/mark-home-page-revamp

Home page revamp