Add --vibration-limit back to CLI usage and disable it by default

README.markdown

@@ -116,6 +116,8 @@ The author of the Silk icon set is Mark James.
         --g0                Use G0 commands for retraction (experimental, not supported by all
                             firmwares)
         --gcode-comments    Make G-code verbose by adding comments (default: no)
+        --vibration-limit   Limit the frequency of moves on X and Y axes (Hz, set zero to disable;
+                            default: 0)
         
       Filament options:
         --filament-diameter Diameter in mm of your raw filament (default: 3)

lib/Slic3r/Config.pm

@@ -432,7 +432,7 @@ our $Options = {
         sidetext => 'Hz',
         cli     => 'vibration-limit=f',
         type    => 'f',
-        default => 15,
+        default => 0,
     },
     
     # print options

slic3r.pl

@@ -164,6 +164,8 @@ $j
     --g0                Use G0 commands for retraction (experimental, not supported by all
                         firmwares)
     --gcode-comments    Make G-code verbose by adding comments (default: no)
+    --vibration-limit   Limit the frequency of moves on X and Y axes (Hz, set zero to disable;
+                        default: $config->{vibration_limit})
     
   Filament options:
     --filament-diameter Diameter in mm of your raw filament (default: $config->{filament_diameter}->[0])