[gtk/matthiasc/for-master] (26 commits) ...docs: Mention shortcuts in the migration guide

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  10cd539... wip: Include markdown content, via pandoc (*)
  3338d24... docs: Be more careful when expanding abbreviations (*)
  9873d98... docs: Convert css overview to markdown (*)
  3bf90b4... doc: Check for pandoc (*)
  b99511e... docs: Convert building, compiling, running to markdown (*)
  bf14d75... docs: Refresh the inspector screenshot (*)
  2595cd5... docs: Convert getting_started to markdown (*)
  29fb9ae... docs: Convert platform sections to markdown (*)
  f44d611... docs: Drop a long-stale file (*)
  5a3fe9e... docs: Convert resources section to markdown (*)
  a37b9d7... docs: Drop the glossary (*)
  581b39a... docs: Allow influencing pandoc divisons (*)
  dc858c9... docs: Convert treeview and textview overview to markdown (*)
  84437ee... docs: Allow interrupted lists (*)
  aca8090... docs: Convert question index to markdown (*)
  f60149c... ci: Add a fedora-docs image (*)
  86f8be4... ci: Use fedora-docs for the doc build (*)
  4dbf73d... Merge branch 'matthiasc/for-master' into 'master' (*)
  ae2e548... docs: Use the right python (*)
  5590e2f... Merge branch 'doc-chapters-markdown' into 'master' (*)
  17b5cfc... docs: Mention pandoc as build dependency
  92d42d4... printing: Drop a redundant assignment
  0f096d6... bitmask: add an assertion
  ec39dde... Help static analysis with an assertion
  a55d179... accelgroup: Drop some unused code
  8c6bbcd... docs: Mention shortcuts in the migration guide

(*) This commit already existed in another branch; no separate mail sent