Fixed problem with drag'n'drop files. Now synfig does import of dropped
files instead of creating a text layer with file URI.
Note: Non-ASCII characters in filenames or paths are not supported yet.
Import files by drag'n'drop now supports non-ASCII characters in
filenames and paths.
Fix #467: Localizations broken for Linux and OSX.
Linux package script: Enable required png target in ImageMagick
Little fix for "import by drag'n'drop" feature. Use Glibmm C++ functions
to parse file URI.
Changed warning message about unsupported URI
Typo