new landing/HIW pages and various UX improvements

• new landing page and How It Works sections, and completely revamped About section, to showcase prototype infographics of upcoming transparency curation products as part of our 3-year plan (so we can start soliciting interest for our next round of funding). these pages include:
  • deliciously mobile friendly
  • touch screen enabled infographic carousels (18 new infographics showing upcoming transparency and credibility curation tools for researchers, journals, universities, and funders)
  • slick FancyBox media viewer to zoom-into detailed infographics!
• improved navbar
  • sticky navbar,
  • mobile friendly,
  • new Browse and HIW/Help links depending on logged-in state of user,
  • avatar directly links to author page (if available), with drop-down carret to access user menu.
• updated and new FAQs
• new hi-res profile pictures in People section
• updated drawer links
• AUTHOR PAGE: new search filter to search through author page articles
• AUTHOR PAGE: embed author page articles on external websites (though not yet exposed in the UI)
• updated replication definition in replication popup and substantially revised replication taxonomy infographic (more detailed instructions on how to categorize methodological similarity, including concrete examples involving published replications)