Open Source: Revise copy (#2520)
Open Source: Revise copy (#2520)

* WIP: Add Slimbook to store

* Experiment with removing Google Fonts

* More tweaking on store style

* Clean up Support page

* Revert some support changes

* Remove Raleway from font styles

* Lots more page heading cleanup

* Clean up Open Source page

* Clean up AppCenter section

* Remove Open Sans and Raleway from brand page

* Remove some unneeded styles

* Tweak blog snippet styling

* Fonts: remove Raleway, add Inter

* Remove Inter Variable fonts

* Add font license

* Fix centering of h1 + p

* Open Source: Revise copy
elementary/mvp,elementary/website,elementary/website,elementary/mvp,elementary/mvp,elementary/website