Minor fix on docs

Author: pitbulk

README.md

@@ -833,7 +833,7 @@ Main class of OneLogin Python Toolkit
 * ***get_settings*** Returns the settings info.
 * ***set_strict*** Set the strict mode active/disable.
 * ***get_last_request_xml*** Returns the most recently-constructed/processed XML SAML request (AuthNRequest, LogoutRequest)
-* ***get_last_response_xml*** Returns the most recently-constructed/processed XML SAML response (SAMLResponse, LogoutResponse). If the SAMLResponse was encrypted, by default tries to return the decrypted XML.
+* ***get_last_response_xml*** Returns the most recently-constructed/processed XML SAML response (SAMLResponse, LogoutResponse). If the SAMLResponse had an encrypted assertion, decrypts it.
 
 ####OneLogin_Saml2_Auth - authn_request.py####
 
@@ -842,7 +842,7 @@ SAML 2 Authentication Request class
 * `__init__` This class handles an AuthNRequest. It builds an AuthNRequest object.
 * ***get_request*** Returns unsigned AuthnRequest.
 * ***get_id*** Returns the AuthNRequest ID.
-
+* ***get_xml*** Returns the XML that will be sent as part of the request.
 
 ####OneLogin_Saml2_Response - response.py####
 
@@ -861,6 +861,7 @@ SAML 2 Authentication Response class
 * ***validate_num_assertions*** Verifies that the document only contains a single Assertion (encrypted or not)
 * ***validate_timestamps*** Verifies that the document is valid according to Conditions Element
 * ***get_error*** After execute a validation process, if fails this method returns the cause
+* ***get_xml_document*** Returns the SAML Response document (If contains an encrypted assertion, decrypts it).
 
 ####OneLogin_Saml2_LogoutRequest - logout_request.py####
 
@@ -875,6 +876,7 @@ SAML 2 Logout Request class
 * ***get_session_indexes*** Gets the SessionIndexes from the Logout Request.
 * ***is_valid*** Checks if the Logout Request recieved is valid.
 * ***get_error*** After execute a validation process, if fails this method returns the cause.
+* ***get_xml*** Returns the XML that will be sent as part of the request or that was received at the SP
 
 ####OneLogin_Saml2_LogoutResponse - logout_response.py####
 
@@ -887,6 +889,7 @@ SAML 2 Logout Response class
 * ***build*** Creates a Logout Response object.
 * ***get_response*** Returns a Logout Response object.
 * ***get_error*** After execute a validation process, if fails this method returns the cause.
+* ***get_xml*** Returns the XML that will be sent as part of the response or that was received at the SP
 
 
 ####OneLogin_Saml2_Settings - settings.py####

src/onelogin/saml2/response.py

@@ -793,10 +793,10 @@ def get_error(self):
 
     def get_xml_document(self):
         """
-        If necessary, decrypt the XML response document, and return it.
+        Returns the SAML Response document (If contains an encrypted assertion, decrypts it)
 
         :return: Decrypted XML response document
-        :rtype: string
+        :rtype: DOMDocument
         """
         if self.encrypted:
             return self.decrypted_document