Displaying the simulation time

[F. R. Rocha]

Add some time lines in the top part of the main cheddar windows in order to displaying the simulation time.

time line to display simulation time is configured in package
config.editor_confid.ads as follows :

-- This constant stores the number of time line
-- we draw between each timing axis
--
Time_Line_Between_Time_Axis : constant Natural := 4;

-- This constant stores how time unit axis are displayed.
-- The constant give a duration (in time unit) between each
-- time display on the axis
--
Display_Witch_Time_Unit_Label : constant Natural := 5;

frank