[libchamplain] (45 commits) ...Merge branch 'wrap2'

[Jiří Techet <jiritechet src gnome org>]

Summary of changes:

  f086416... view: Make tile_map functions hash table agnostic (*)
  53c8d15... view: Add visible tiles hash table (*)
  1224e9a... view: Implement and add horizontal-wrap property (*)
  1995f16... launcher-gtk: Add horizontal wrap toggle button (*)
  fbc3cec... Always check whether to wrap when viewport moved (*)
  f618ff9... Remove left clones as they are always invisible (*)
  e6d5be4... Position master correctly when enabling/disabling wrap (*)
  a8407f7... Optimize x_to_wrap_x() (*)
  35e23b8... Create get_map_width() utility function and use it when nee (*)
  53fe34e... Fix return value type warning (*)
  24bf85f... Some whitespace changes to follow libchamplain coding style (*)
  3153efc... Remove clones of user_layers (*)
  fdc7696... Don't use zoom-level signal to update clones (*)
  1b42a10... Reposition viewport after zooming and view scaling (*)
  d5dadc1... Use gdouble in x_to_wrap_x to avoid precision loss (*)
  dfe6458... Add viewport offset to champlain_view_x_to_longitude
  e232259... Fix zooming animation.
  b38e4a8... Add swappable user layer clones.
  e731df3... Sample neighboring user layer slots for reactive child acto
  acaf0c1... Merge commit 'origin/wrap~10'
  8c1aa99... Make path layer draw all visible areas.
  e1fc80b... Explicitly set map_layer size on relocation.
  f59ca03... Change enter-event to motion-event for user layer slot swap
  95f57be... Make path layer anchor aware.
  a8bfb04... Fix clutter_canvas_set_size errors in console.
  794670d... Pick up wrap events at viewport level, not clones.
  c7f9ed8... Destroy zoom_actor even if no tiles finished downloading.
  c878dfb... Reposition user_layers after disabling horizontal_wrap.
  40be512... Static sizes are not needed anymore for user layers.
  365bb2c... Fix coding style.
  881bba8... Move variable declarations at the beginning of blocks.
  1888936... Factor out repetitive actor initialization code for the pat
  05b101a... Add descriptive comment on path layer rendering.
  b48d0fd... Fix clone_index check in viewport_motion_cb.
  24f4dc9... Ensure sample_user_layer_at_pos returns a reactive user_lay
  3d900b9... Remove unnecessary checks in load_visible_tiles.
  e06d605... User layers are now unreactive by default, no need to expli
  14f7d5e... Add descriptive comment to show_zoom_actor hwrap behavior.
  34eb2bb... Enable get_map_size in champlain_path_layer to return the s
  46cc00a... Make path layer exportablility compatible with recent wrap 
  1bfaa4c... Make the view export a wrapped map.
  105a2e8... Fix memory management for surfaces in path layer.
  dc5e312... Add descriptive comments.
  0862490... Hide left_actor in path layer when no clone is visible.
  4d492a3... Merge branch 'wrap2'

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