Accept both relative and absolute extrusion width values. #151

README.markdown

@@ -211,9 +211,8 @@ The author is Alessandro Ranellucci.
         --notes             Notes to be added as comments to the output file
       
        Flow options (advanced):
-        --extrusion-width-ratio
-                            Calculate the extrusion width as the layer height multiplied by
-                            this value (> 0, default: calculated automatically)
+        --extrusion-width   Set extrusion width manually; it accepts either an absolute value in mm
+                            (like 0.65) or a percentage over layer height (like 200%)
         --bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: 1)