Log Message:
tex-mcf2graph{,-doc}: update to 4.40

-add function MC()
-change function name MCa() => MCat()
-delete function MCc(),MCd(),MCf()
-add angle parameter mangle
-add size parameter
   thickness_mframe
-change size parameter name
   bond_len => blength
   max_bond_length => max_blength
   font_wd,font_ht => fsize(w,h)
   margin_left_right,margin_top_bottom
     => fmargin(w,h)
   thickness_font_frame => thickness_fframe
   thickness_atom_frame => thickness_aframe
-delete ratio parameter ratio_bond_width
-delete option parameter sw_solid
-change option parameter name
   sw_clip        => sw_trimming
   sw_bond_single => sw_single
   sw_fomt_frame  => sw_fframe
   sw_mol_frame   => sw_mframe
   sw_atom_frame  => sw_aframe
-update MCF manual