tex-mcf2graph{,-doc}: update to 4.57

-change syntax
    n:@ => @n
    n:# => &n
    &"+" => "+"
    &"-" => "-"
    |=n  => #n
    =|  => ##
-delete command ``
-delete command a@#b
-delete command A[1],A[-1]
-delete bond type d,w,z
-fix bug in MOL file output
-fix bug in molecular weight calculation
-fix bug in report output
-fix bug in MOL file output
-improve parts definition
-improve global ext() setting
-fix bug in molecular weight calculation
-fix bug in charged atom calculation
-add commands
    ?!  : /_,!
    ??  : /_^35,/_-35
    /?!  : isopropyl
    /??! : tert-butyl
-change syntax
    /N!_ => /N?! : dimethylamino
-improve inline definition
-improve aux file output,input

(markd)