* Basic onboarding modal that's shown to users once
* Lay out pages 2 through 5, add images, style modals (#1509)
* Lay out pages 2 through 5
Added images and laid out pages 2 through 5 in the jsx file. SCSS will
come, still working on just seeing if this works at all.
* Fix jsx errors, add images to modal pages, style modal pages
* Add animations to onboarding pager changes, improve wording and styling
* Finishing touches on the onboarding
* Add missing propTypes
* Update wording
to only those from local users; Add link to "extended information" to
getting started in the UI; Add defaults for posting privacy; Change
how publish button looks depending on posting privacy chosen
