Update README.md

Author: jacol

README.md

@@ -6,6 +6,8 @@ Computing how similar are 2 photos
 var reader = new ImageReader();
 var strategy = new StrictMatcherStrategy();            
 var runner = new ImageMatcherRunner(reader, strategy);
-var result = runner.RunMatcher("TestData/TestImage.png", "TestData/TestImage.png");
+var result = runner.RunMatcher("TestData/TestImage.png", "TestData/TestImage.png", true, 320);
 ```
+First 2 arguments are files to compare. Third argument tells to resize image before diff compare + forth param with target width after resize.
+
 Result is number from 0 to 100. 0 means photots are exacly the same (based on strategy used). 100 is black image vs. white image - 100% dismatch. So far there is only one strategy - but so far it was sufficient to get reasonable results.