doc: organize chapters into parts, and reduce toc depth

Reorganize the chapters into parts and reduce the TOC depth to make the TOC useful again. The top-level TOC is very brief, but that is fine because every part will have its own TOC. Section titles of languages/frameworks are also simplified to just the name of the language/framework.
2019-10-20 12:17:58 +02:00
parent af7378397f
commit 95dfbe2d63
13 changed files with 41 additions and 29 deletions
--- a/doc/languages-frameworks/r.section.md
+++ b/doc/languages-frameworks/r.section.md
@@ -1,5 +1,5 @@
-R packages
-==========
+R
+=

 ## Installation