Blender Git Loki

removed blenders backup feature.
sprintf(str, "/bin/su root -c 'cd %s; /bin/tar cf - "%s" | (/bin/cd %s; /bin/tar xf -)'", from, file, to);
return system(str);

This would ask for a password in blenders terminal, in ubuntu there is no root user...
If this feature is added back it should be written in a much nicer way.

Also made HKey toggle hidden files in the file selector.