Log Message:
tex-mcf2graph{,-doc}: update to 5.12

5.12
-add command `(),``()
 define group "string"
 `("{string}")
 ``("{string}")(atom list)
-update mcf2graph.mp
-update main_lib.mcf
-update MCF manual,example

5.11
-change command name
 !!  => !db,!d
 !!! => !tm,!t
-change group name
 CCl2=> ?Cl!Cl
 CCl3=> ?Cl?Cl!Cl
 CF2 => ?F!F
 CF3 => ?F?F!F
-add abbreviated form command
 !wf,!w : !~wf
 !zf,!z : !~zf
 !db,!d : !~db
 !wb : !~wb
 !zb : !~zb
 !dl : !~dl
 !dr : !~dr
 !dm : !~dm
-update main_lib.mcf,template_lib.mcf
-update MCF manual,example

5.10
-add binary operator +
 a + b : '(a,b)
-change group name
 CO => ?O,  COO => ?O!O
 SO => S?O, SOO => S?O?O
 N! => N?,  N!2 => N?2
-change command name of add(),ext()
 ** => #
-fix bug in expand mode
-update MCF manual,example