1..8
# sfFilesystem canonicalizes pathes
 -  correctly resolves  and 
# sfFilesystem calculates relative pathes
 -  correctly calculates the relative path
 -  correctly calculates the relative path for dirs that share chars
 -  works without going up one dir
 -  returns absolute path when no relative path possible
 -  correctly calculates the relative path for dirs that share chars
 -  correctly calculates the relative path for dirs that share chars
 -  correctly calculates the relative path for dirs that share chars
# Looks like everything went fine.