README.md in isbn-2.0.5 vs README.md in isbn-2.0.6

- old
+ new

@@ -22,5 +22,7 @@
 
 * ISBN.valid? will compare the check digit of the passed in isbn with that of one it computes
 
 * ISBN.from_image accept a jpeg of an isbn and OCR it into an isbn.
  - it depends on the LibJpeg and Gocr libraries. I recommend [Homebrew](http://github.com/mxcl/homebrew).
+ 
+* ISBN.from_string fetches isbn from string