Fix issue #491 - Run "Add Skeleton (Simple)" crash

http://www.synfig.org/issues/thebuggenie/synfig/issues/491
Probably we don't need copy() operator in IMPORT_VALUE macros
Use cartoonish duck instead of dog for import image layer
Fix import image icon file
Polish time track panel icon by add some more details
Update value node (link) icon
Fix ease waypoint icon by add two straight lines
Fix lines position for ease waypoint icon on time track panel
Update waypoint icons with tango color palette on time track panel
Apply tango dark(Aluminium) for waypoint icons outline
Merge pull request #85 from morevnaproject/master

Apply icons by Yu Chen
Fix build 2 errors on Fedora

add boost-devel to linux autobuild script and include string.h to png target.
Make toolbox translatable again.
Add appdata file

Applications wishing to have long descriptions, screenshots and other useful things
are required to ship one or more files in /usr/share/appdata/%{id}.appdata.xml.
see pttp://people.freedesktop.org/~hughsient/appdata/
Merge pull request #86 from jcome/jcome

Fix build 2 errors on Fedora
Linux build script: Add support for ALT Linux
Linux package: Update buildroot version to Debian Lenny
Win32 build script cleanup
New crosscompile script for creating linux packages.

Benefits of new approach:
* No root prevelegies required
* Allows to build from current working tree
* No need to create full package to test modifications
* Allows to build with custom library set, without affecting system libraries
* Easy to debug
Keep improving Linux packaging script