Management of Font Awesome assets

[mcoker]

Currently the FA icons we're using are from the default set, stripped down to the icons specified to be used in PF4. I talked to @mindreeper2420 and he shared some assets used for the original implementation.

• PatternFly 4 icon list
• PatternFly 3 vs 4 comparison list
• Adam's sketch file

How do we want to manage these going forward? Do we want to use a tool like Iconmoon or Fontello to make management easier? Should we add global vars for the content strings to use when defining an icon directly into a pseudo element (ie, not using .fas.fa-icon-name) as mentioned in the breadcrumb component?

Also check to see what we should do about thes PF3 icons

• Icons - Add PatternFly 3 icons #375
• are these included here? chore(pf-icons): create icon definition and generate pf icons #766

And maybe open a separate issue for a demo page

• Icon Demo #370

cc @matthewcarleton @LHinson

[mcoker]

related - #771