Merge branch 'master' into fread_connections

Author: ben-schwen

.gitattributes

@@ -1,6 +1,7 @@
 * text eol=lf
 *.ico   -text
 *.mo    -text
+*.pdf   -text
 *.png   -text
 *.RData -text
 # Important for test CSV files, where we definitely

.github/CONTRIBUTING.md

@@ -11,7 +11,7 @@ Filing issues
 
 - Please read and follow all the instructions at **[Support](https://github.com/Rdatatable/data.table/wiki/Support)** before filing; e.g. **check [NEWS](https://github.com/Rdatatable/data.table/blob/master/NEWS.md)** first and **search existing [Issues](https://github.com/Rdatatable/data.table/issues)**.
 - One issue for one purpose. Don't report more than one bug or request several features in the same issue.
-- Feel free to add reactions to existing issues that are important to you. We monitor this and it helps us prioritize where to devote our efforts! We expect [this issue](https://github.com/Rdatatable/data.table/issues/3189) to be evergreen.
+- Feel free to add reactions to existing issues that are important to you. We [monitor this](https://github.com/Rdatatable/data.table/issues?q=is%3Aissue%20state%3Aopen%20sort%3Areactions-%2B1-desc) and assign [Top request label](https://github.com/Rdatatable/data.table/issues?q=is%3Aissue%20state%3Aopen%20label%3A%22top%20request%22) to prioritize where to devote our efforts!
 
 **Filing issues is contributing. Thank you!**
 

NEWS.md

@@ -1,4 +1,4 @@
-# data.table news and updates
+## data.table news and updates
 
 **If you are viewing this file on CRAN, please check [latest news on GitHub](https://github.com/Rdatatable/data.table/blob/master/NEWS.md) where the formatting is also better.**
 

_pkgdown.yml

@@ -7,6 +7,9 @@ template:
 development:
   version_tooltip: "Development version"
 
+news:
+  one_page: true
+
 home:
   links:
   - text: CRAN-like website
@@ -18,7 +21,7 @@ home:
 
 navbar:
   structure:
-    left:  [home, introduction, articles, news, benchmarks, presentations, communityarticles, reference]
+    left:  [home, introduction, articles, news, benchmarks, presentations, communityarticles, reference, cheatsheet]
     right: [search, github, lightswitch]
   components:
     home:
@@ -67,6 +70,13 @@ navbar:
     reference:
       text: Manual
       href: reference/index.html
+    cheatsheet:
+      text: Cheatsheet
+      menu:
+      - text: "English"
+        href: datatable_cheatsheet.pdf
+      - text: "Français"
+        href: datatable_cheatsheet_fr.pdf
     github:
       icon: fab fa-github fa-lg
       href: https://github.com/Rdatatable/data.table