[totem] (86 commits) ...Use new Totem logo for 3.31

[Bastien Nocera <hadess src gnome org>]

Summary of changes:

  09ef4da... help: Removed old help and began re-writing it in Mallard. (*)
  21f45a4... help: Fix validation errors in help (*)
  56ff39c... help: Correct links between pages (*)
  290a207... help: Review introduction.page (*)
  cdd8e0f... help: Review adjustment-sound.page (*)
  a68019c... help: Review properties.page (*)
  4900ab0... help: Review keyboard-shortcuts.page (*)
  a8be634... help: Review screenshot-gallery.page (*)
  5fad6ae... help: Add new pages for Totem help. (*)
  819e64d... help: Minor fixup to navigation.page (*)
  14c32bf... help: Split sound page into language and volume (*)
  4c0f9f9... help: Update help page on zooming and aspect ratio (*)
  fb4b776... help: Fix help links to sound page (*)
  d8fd8e6... help: Review file-open.page (*)
  448d730... help: Final review of introduction.page (*)
  2aca13e... help: Final review of keyboard-shortcuts.page (*)
  5a816dd... help: Replace Totem by Videos (*)
  91a8afa... help: Replace Totem by Videos (*)
  014b089... help: Fix typo (*)
  0f411e0... help: Remove plugin names as they are distro specific; move (*)
  694e900... help: Remove keyboard shortcuts page (*)
  e3b2780... help: Update how screenshots are taken (*)
  a825206... help: Audio CDs not supported; use another application (*)
  77f34f0... help: Use proper markup for menuitem (*)
  09255ef... help: Update Zoom In documentation (*)
  17e1aaa... help: No more Fit Window to Movie (*)
  ec7abc0... help: Correct steps for Aspect Ratio (*)
  4d81a96... help: Fix markup (*)
  2cbbbd1... help: Update how to change the volume (*)
  ae9cdde... help: No more File Saving (*)
  5b43795... help: Remove comment as audio and video properties are mutu (*)
  f5c4b7c... help: Update steps how to see properties of a played media  (*)
  a975150... help: Remove audio and music references; Totem is a video p (*)
  f983e35... help: No more filtering by file type in the Open File dialo (*)
  04bf3c5... help: Update ways how to open/add videos (*)
  181fffd... help: Update Preferences; no more Visual Effects etc (*)
  966f150... help: No more sidebar since 2014 (*)
  59ad40e... help: No more sidebar since 2014 (*)
  c149656... help: No more sidebar since 2014 (*)
  bb06e33... help: No more sidebar since 2014 (*)
  5773f48... help: Update meson.build for work done so far (*)
  4bc1c9a... help: Fix broken markup (*)
  59571a5... help: Fix broken markup (*)
  a5c066f... help: GStreamer is already covered in supported-formats (*)
  10f0974... help: Update name of section in Preferences (*)
  24f7a15... help: Fix grammar (*)
  071bb25... help: Update and clarify steps for taking a screenshot gall (*)
  907880a... help: Move introduction content to index page; delete usele (*)
  c8cde8f... help: No more custom playlists or playing orders (*)
  906799e... help: Cover how to change the playback rate (*)
  dd6c95a... help: Make page IDs match file names (*)
  2515b23... help: Correct link to page ID after last commit (*)
  9ce590c... help: Update steps for subtitles (*)
  18f7aaf... help: Clarify where to set loading subtitles automatically (*)
  c306bdc... help: Correct wrong statement about using BBC services (*)
  e1dd849... help: Move Plugins into Preferences, because that's where t (*)
  65acc1c... help: No more BBC iPlayer (*)
  16dcd5f... help: Update steps to set the language (*)
  5a211e9... help: Fix markup in previous commit (*)
  50085e7... help: Update steps how to search for subtitles (*)
  68963a7... help: Cover keyboard shortcuts for zooming (*)
  767da6f... help: Don't abuse <code> for non-code text (*)
  d96abf7... help: Don't abuse <code> for non-code text (*)
  44282ca... help: Mention error message and ask distro about libdvdcss (*)
  1dcfa11... help: Don't abuse <code> for non-code text (*)
  3e7d8af... help: Don't abuse <code> for non-code text (*)
  3aa0098... help: Fix application name (*)
  54aa2cd... help: Load ITS namespace by default on all pages (*)
  64d530e... help: Remove empty Extra Features section (*)
  c2523a6... help: Add general troubleshooting page: How to debug, where (*)
  905c301... help: Clarify how to open videos after adding them (*)
  1a3d61a... help: Cover how to open DVDs (*)
  63601b8... help: Remove unneeded markup parameter (*)
  1858c2c... help: Mark author names and emails as non-translatable (*)
  60241b3... help: Move DVD opening to its page; fix a TODO (*)
  e51e2a1... help: Add stub for channels once someone understands that (*)
  0739ade... help: Changing the zoom is Playing Media, not Application A (*)
  7ba277e... help: Move Preferences to Advanced; don't mention subtitles (*)
  8bfc9e7... help: Remove now empty Application adjustment section (*)
  e6d3b7f... help: Mention automatic dialog to install missing codecs (*)
  f6f510a... help: Update available Navigation options (*)
  1516bfd... help: Remove unhelpful See Also links (*)
  b47bca0... help: Fix broken markup (*)
  a5c7fc5... help: Fix broken markup (*)
  9105eb6... Mark an image as non-translatable (*)
  67bdb30... Use new Totem logo for 3.31 (*)

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