documentation, fix unit tests

requirements.txt

@@ -83,4 +83,5 @@ pyquickhelper
 pymyinstall
 colormap
 easydev
-qgrid
+qgrid
+pandas_datareader

src/pyensae/remote/magic_azure.py

@@ -23,6 +23,47 @@ class MagicAzure(MagicClassWithHelpers):
     and `HDInsight <http://azure.microsoft.com/fr-fr/services/hdinsight/>`_.
 
     When the container is not specified, it will take the default one.
+    
+    @FAQ(Magic command %blob_open does not work)
+    
+    Try this::
+    
+        %load_ext pyensae
+        
+    The exception tells more about what goes wrong.
+    Usually a module is missing.
+    
+    @endFAQ
+    
+    @FAQ(Incorrect padding)
+    
+    The following crypted message happens sometimes::
+    
+        Error: Incorrect padding
+        
+    It is usually due to an incorrect password. 
+    Some notebooks uses::
+    
+        import pyquickhelper.ipythonhelper as ipy
+        params={"blob_storage":"hdblobstorage", "password":""}
+        ipy.open_html_form(params=params,title="credentials",key_save="blobservice")        
+        
+        blobstorage = blobservice["blob_storage"]
+        blobpassword = blobservice["password"]        
+        
+        import pyensae
+        %blob_open
+        
+    This code avoids the author letting password in a notebook
+    but you can just replace everything by::
+
+        blobstorage = "<username>"
+        blobpassword = "****long*key*******=="
+        
+        import pyensae
+        %blob_open
+    
+    @endFAQ
     """
 
     def create_client(self, account_name, account_key,