newFromFile
Creates a new animation by loading it from a file.
The file format is detected automatically.
If the file's format does not support multi-frame images, then an animation with a single frame will be created.
Possible errors are in the GDK_PIXBUF_ERROR and G_FILE_ERROR domains.
Return
A newly-created animation
Parameters
filename
Name of file to load, in the GLib file name encoding