Fix count bugs (#1)

* tail/head working
* check if votes is null.

README.rst

@@ -6,12 +6,51 @@ RFD CLI
 
 
 Installation:
+=============
+
+.. code-block::
 
     pip install rfd
 
 Usage
+=====
 
-    rfd threads 9 --count 10
+.. code-block::
 
 
-.. image:: images/rfd_threads_9.png
+    rfd threads 9 [--count 5]
+
+
+.. image:: https://user-images.githubusercontent.com/4519234/37319853-3a03fb9c-2647-11e8-806e-17156541cf43.png
+
+
+Examples:
+=========
+
+
+tail a post:
+---------------
+
+.. code-block::
+    
+    
+    ▶ rfd posts https://forums.redflagdeals.com/koodo-targeted-public-mobile-12-120-koodo-6gb-40-no-referrals-2176935/ --tail 4
+    
+    --------------------------------------------------------------------------
+     - [0] For those worried about credit ratings, according to Boworell, my credit score rose by 44 points since last month.  I did absolutely nothing except open 3 Koodo lines all with medium tabs and I paid off 1 in full the very next day (Shaner)
+    
+    --------------------------------------------------------------------------
+     - [0] If we want to keep our PM plan but use the code to set up a spouse on the plan is that still okay?
+    I've read that the port can only be used once now, but does it matter which phone number is ported in? (kid_icarus)
+    
+    --------------------------------------------------------------------------
+     - [0] blackboxvr6 wrote: ↑Mar 12th, 2018 2:13 pm
+    Legit 1st line on Wednesday, no shipping email yet...
+    
+    
+    Tuesday before noon and still waiting. (gardener28)
+    
+    --------------------------------------------------------------------------
+     - [0] Ordered a SIM last Wednesday, haven't heard a peep from Koodo since the initial order confirmation e-mail. (DaJinx)
+    
+    --------------------------------------------------------------------------