Export canvas with value nodes
Import all external canvases while saving into container (.sfg)
Fix bug with resaving container.
Replace prefix "container:" to "#"
Fix naming of imported canvases
Fix bug with disappearing images after save into container
Typo
Embed layer action
Typo
Extract layer action
Short filenames params: #filename.png instead of #images/filename.png
Revert criteria of z range visibility. layers are visible now in the interval [position + depth) that is, included the left boundary and excluded the right boundary.
Redefine nomenclature for Z Range parameters and members.
Fix correct z range visibility
Add missing renamed local description.
Merge pull request #66 from genete/group-switch

Group switch
Merge remote-tracking branch 'ivan/improve-zip-container' into morevna

* ivan/improve-zip-container:
  Short filenames params: #filename.png instead of #images/filename.png
  Extract layer action
  Typo
  Embed layer action
  Typo
  Fix bug with disappearing images after save into container
  Fix naming of imported canvases
  Replace prefix "container:" to "#"
  Fix bug with resaving container.
  Import all external canvases while saving into container (.sfg)
  Export canvas with value nodes
  Fix bug with saving images into container
  Code for include external canvases into container. Not works yet
  Change extension of zip-container to "sfg"
  Fix bug with zip-container
  Remove debug code
  Allow to "export" external canvas
  Split large macro definition for better debugging
  fix warning in filecontainerzip.cpp
  Derive FileSystem::(Read/Write)Stream from std::(i/o)stream

Conflicts:
	synfig-core/src/synfig/filecontainerzip.cpp
	synfig-studio/src/synfigapp/action.cpp
Merge branch '0.64.1' into morevna

* 0.64.1: (27 commits)
  Add "Enable experimental features" option. Does nothing at the moment.
  Ffmpeg target: Replace deprecated option - "loop_input". Fixes #345.
  Win32 build: Fix ffmpeg invocation
  Rearrange interpolation/static icons into different column
  Fix Magick++ in OSX build
  Enable Magick++ module for Linux packages
  Make parameter list uses forbid animation icon instead of animate mod off icon
  Add forbid animation icon(used in paramerter panel)
  Use stroboscope and skeleton layer icons for layer tree
  Correct the canvas panel icon
  Add initial version of Stroboscope icon.
  Add skeleton layer icon.
  Update canvas panel and import image layer icons
  Cleanup by removing unused sif files according to the interpolation type icons update
  Delete unused sif interpolation type icon files
  Fine-tune interpolation type icons and using all icnos in one sif file concept to enable easy maintainance
  Cygwin build: Revert 3f05fb2b, because it's not really required
  Cygwin build: Fix environment switch procedure for pkg-config
  Cygwin build: Explicitly disable lzma in ImageMagick
  Cygwin build: Ensure we have cross-compile environment configured for imagemagick
  ...

Conflicts:
	synfig-core/configure.ac
Functionality for read history
History interface
Merge remote-tracking branch 'ivan/improve-zip-container' into morevna

* ivan/improve-zip-container:
  History interface
  Functionality for read history