Alan Dipert 3cea5fb2d0 Upgrade FontAwesome to 5.3.1 (#2186) ...

* Upgrade FontAwesome to 5.3.1

- Upgrades FontAwesome to a new major (breaking) version, but
  is backwards compatible because we include the v4-shims CSS that maps
  old names to new.
- This is a step toward full V5 adoption that doesn't require us to
  come up with a plan for deprecating V4 icon names.
- Details: https://fontawesome.com/how-to-use/on-the-web/setup/upgrading-from-version-4
- Related to #2156 and #1966

* Improvements to icon

- Clarify in docs that fontawesome V5 icons accessible with V4-style names
- Make icons browseable: icon('address-book') will now open the Viewer
  pane of RStudio IDE so that icons can be experimented with more easily.

* Update LICENSE with CC for FontAwesome .svgs

* Update NEWS

2018-09-18 13:30:14 -07:00

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