Log Message:
Import gfm-1.06 as sysutils/gfm.

The GFM is an application allowing to manipulate single/group/tigroup files. It
can:

 * create a new file
 * open an existing file
 * save file
 * rename variables
 * remove variables
 * create folders
 * group files into a group/tigroup file
 * ungroup a group/tigroup file into single files