Minor website tweaks (#3953)

* Mark RStudio as funder (so appears in footer)

* Use multiple heading levels on reference

* Use news metadata structure

Author: hadley

DESCRIPTION

@@ -15,7 +15,7 @@ Authors@R: c(
     person("Kara", "Woo", role = "aut"),
     person("Hiroaki", "Yutani", role = "aut"),
     person("Dewey", "Dunnington", role = "aut"),
-    person("RStudio", role = c("cph"))
+    person("RStudio", role = c("cph", "fnd"))
     )
 Depends:
     R (>= 3.2)

_pkgdown.yml

@@ -31,7 +31,9 @@ reference:
   - ggsave
   - qplot
 
-- title: "Layer: geoms"
+- title: Layers
+
+- subtitle: Geoms
   desc: >
     A layer combines data, aesthetic mapping, a geom (geometric object),
     a stat (statistical transformation), and a position adjustment. Typically,
@@ -40,7 +42,7 @@ reference:
   contents:
   - starts_with("geom_")
 
-- title: "Layer: stats"
+- subtitle: Stats
   desc: >
     A handful of layers are more easily specified with a `stat_` function,
     drawing attention to the statistical transformation rather than the visual
@@ -56,15 +58,15 @@ reference:
   - stat_sf_coordinates
   - after_stat
 
-- title: "Layer: position adjustment"
+- subtitle: Position adjustment
   desc: >
     All layers have a position adjustment that resolves overlapping geoms.
     Override the default by using the `position` argument to the `geom_` or
     `stat_` function.
   contents:
   - starts_with("position_")
 
-- title: "Layer: annotations"
+- subtitle: Annotations
   desc: >
     Annotations are a special type of layer that don't inherit global settings
     from the plot. They are used to add fixed reference data to plots.
@@ -129,7 +131,7 @@ reference:
   - facet_wrap
   - vars
 
-- title: "Facetting: labels"
+- subtitle: Labels
   desc: >
     These functions provide a flexible toolkit for controlling the display
     of the "strip" labels on facets.
@@ -225,34 +227,30 @@ reference:
   - fortify
   - map_data
 
+news:
+  releases:
+  - text: "Version 3.3.0"
+    href: https://www.tidyverse.org/blog/2020/03/ggplot2-3-3-0/
+  - text: "Version 3.2.0"
+    href: https://www.tidyverse.org/articles/2019/06/ggplot2-3-2-0/
+  - text: "Version 3.1.0"
+    href: https://www.tidyverse.org/articles/2018/10/ggplot2-3-1-0/
+  - text: "Version 3.0.0"
+    href: https://www.tidyverse.org/articles/2018/07/ggplot2-3-0-0/
+  - text: "Version 2.2.0"
+    href: https://blog.rstudio.com/2016/11/14/ggplot2-2-2-0/
+  - text: "Version 2.1.0"
+    href: https://blog.rstudio.com/2016/03/03/ggplot2-2-1-0/
+  - text: "Version 2.0.0"
+    href: https://blog.rstudio.com/2015/12/21/ggplot2-2-0-0/
+  - text: "Version 1.0.0"
+    href: https://blog.rstudio.com/2015/01/09/ggplot2-updates/
+
 navbar:
   structure:
     right: [extensions, github]
   components:
     home: ~
-    news:
-      text: News
-      menu:
-      - text: "Release notes"
-      - text: "Version 3.3.0"
-        href: https://www.tidyverse.org/blog/2020/03/ggplot2-3-3-0/
-      - text: "Version 3.2.0"
-        href: https://www.tidyverse.org/articles/2019/06/ggplot2-3-2-0/
-      - text: "Version 3.1.0"
-        href: https://www.tidyverse.org/articles/2018/10/ggplot2-3-1-0/
-      - text: "Version 3.0.0"
-        href: https://www.tidyverse.org/articles/2018/07/ggplot2-3-0-0/
-      - text: "Version 2.2.0"
-        href: https://blog.rstudio.com/2016/11/14/ggplot2-2-2-0/
-      - text: "Version 2.1.0"
-        href: https://blog.rstudio.com/2016/03/03/ggplot2-2-1-0/
-      - text: "Version 2.0.0"
-        href: https://blog.rstudio.com/2015/12/21/ggplot2-2-0-0/
-      - text: "Version 1.0.0"
-        href: https://blog.rstudio.com/2015/01/09/ggplot2-updates/
-      - text: "------------------"
-      - text: "Change log"
-        href: news/index.html
     extensions:
       text: Extensions
       href: https://exts.ggplot2.tidyverse.org/gallery/