Expose raw_headers (#113)

(Also reorder the class documentation a bit and remove duplicate
headers documentation.)

Fixes #112.

wptserve/request.py

@@ -187,14 +187,6 @@ class Request(object):
 
     Absolute URL for the request.
 
-    .. attribute:: headers
-
-    List of request headers.
-
-    .. attribute:: raw_input
-
-    File-like object representing the body of the request.
-
     .. attribute:: url_parts
 
     Parts of the requested URL as obtained by urlparse.urlsplit(path)
@@ -208,10 +200,18 @@ class Request(object):
     RequestHeaders object providing a dictionary-like representation of
     the request headers.
 
+    .. attribute:: raw_headers.
+
+    Dictionary of non-normalized request headers.
+
     .. attribute:: body
 
     Request body as a string
 
+    .. attribute:: raw_input
+
+    File-like object representing the body of the request.
+
     .. attribute:: GET
 
     MultiDict representing the parameters supplied with the request.
@@ -268,7 +268,7 @@ def __init__(self, request_handler):
                                       self.request_path)
         self.url_parts = urlsplit(self.url)
 
-        self._raw_headers = request_handler.headers
+        self.raw_headers = request_handler.headers
 
         self.request_line = request_handler.raw_requestline
 
@@ -326,7 +326,7 @@ def cookies(self):
     @property
     def headers(self):
         if self._headers is None:
-            self._headers = RequestHeaders(self._raw_headers)
+            self._headers = RequestHeaders(self.raw_headers)
         return self._headers
 
     @property