Updateing stroke screenshot and adding some docu

Author: Milchreis

README.md

@@ -237,9 +237,17 @@ PImage processedImage = Glitch.apply(image, intensity, scanlineheight);
 #### Strokes image
 ![alt lookup-table](https://github.com/Milchreis/processing-imageprocessing/blob/master/img/strokes.png?raw=true)
 ```java
-// gridSize is positive and the area for compound pixels
-// lineLength is positive and the length in pixels for each line
+// gridSize 
+// lineLength 
 PImage processedImage = Strokes.apply(image, gridSize, lineLength);
+PImage processedImage = Strokes.apply(image, 
+    gridSize,           // is positive and the area for compound pixels 
+    lineLength,         // is positive and the length in pixels for each line
+    lineWeight,         // is positive and the weight of each line in pixel
+    linesPerGrid,       // the number of lines per grid
+    lineIntensity,      // alpha value for each line between 0 and 255
+    inColor,            // true for colors else black and white
+    backgroundColor);   // color for the background
 ```
 
 #### Dithering

examples/StrokesExample/StrokesExample.pde

@@ -24,8 +24,16 @@ void draw() {
 
     int gridSize = (int) map(mouseX, 0, width, 4, 20);
     int lineLength = (int) map(mouseY, 0, height, 1, 20);
+    int lineWeight = 2;
+    int linesPerGrid = 4;
+    int lineIntensity = 220;
+    boolean inColor = true;
+    color backgroundColor = 255;
+
+    PImage processedImage = Strokes.apply(image,
+        gridSize, lineLength, lineWeight,
+        linesPerGrid, lineIntensity, inColor, backgroundColor);
 
-    PImage processedImage = Strokes.apply(image, gridSize, lineLength);
     image(processedImage, 0, 0);
   }
 }