Document the Raw class with a code sample

rawkit/raw.py

@@ -3,6 +3,20 @@
 
 class Raw(object):
 
+    """
+    Represents a raw file (of any format) and exposes development options to
+    the user.
+
+    For example, the basic workflow (open a file, process the file, save the
+    file) looks like this::
+
+        from rawkit.raw import Raw
+
+        with Raw(filename='some/raw/image.CR2') as raw:
+            raw.process()
+            raw.save(filename='some/destination/image.ppm')
+    """
+
     def __init__(self, filename=None):
         """
         Create a new Raw object and load the given raw file.