Mention the colors of the different bounding box annotations

Author: mhucka

README.md

@@ -244,9 +244,9 @@ Handprint produces copies of the input images overlaid with the recognition resu
 
 * `text`: display the text recognized in the image (default)
 * `bb`: display all bounding boxes returned by the service
-* `bb-word`: display the bounding boxes for words
-* `bb-line`: display the bounding boxes for lines
-* `bb-para`: display the bounding boxes for paragraphs
+* `bb-word`: display the bounding boxes for words (in red)
+* `bb-line`: display the bounding boxes for lines (in blue)
+* `bb-para`: display the bounding boxes for paragraphs (in green)
 
 Separate multiple values with a comma.  The option `bb` is a shorthand for the value `bb-word,bb-line,bb-para`.  As an example, the following command will show both the recognized text and the bounding boxes around words:
 ```sh

handprint/__main__.py

@@ -248,9 +248,9 @@ def main(add_creds = 'A', base_name = 'B', no_color = False, compare = False,
 
   text    -- display the text recognized in the image (default)
   bb      -- display all bounding boxes returned by the service
-  bb-word -- display only the bounding boxes for words
-  bb-line -- display only the bounding boxes for lines
-  bb-para -- display only the bounding boxes for paragraphs
+  bb-word -- display only the bounding boxes for words (in red)
+  bb-line -- display only the bounding boxes for lines (in blue)
+  bb-para -- display only the bounding boxes for paragraphs (in green)
 
 Separate multiple values with a comma.  The option "bb" is a shorthand for the
 value "bb-word,bb-line,bb-para".  As an example, the following command will