[gitg] (16 commits) Non-fast-forward update to branch xiaoguang/split-view

[Alberto Fanjul <albfan src gnome org>]

The branch 'xiaoguang/split-view' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  024be39... diff-view: Add split view function
  b2136cc... change button for view to radio button

Commits added to the branch:

  95e9678... meson: Remove install_dir for default directories (*)
  fd9f6c4... meson: Add trailing commas (*)
  d4b8339... meson: Remove auxiliary variables (*)
  5375bc4... meson: Improved linker flag support checks (*)
  d7c544d... meson: Move meson declarations (*)
  99fef67... meson: Remove PACKAGE_VERSION definition (*)
  8b09eb1... meson: Fix dependencies (*)
  8e7da99... meson: Improve libraries variable naming (*)
  5a32e34... meson: Fix valadoc documentation generation (*)
  bcac876... meson: Remove gitg shared library generation (*)
  3320992... meson: Fix GTK shortcuts window vala flag (*)
  0cfd07f... flatpak: build vala to use valadoc without graphviz (*)
  91d2322... gitlabci: Publish docs (*)
  04309f6... Flatpak: Add enchant 1 as a dependancy module (*)
  4386a0f... diff-view: Add split view function
  c5a1d12... change button for view to radio button

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