Updated read me

Author: stevenc81

README.md

@@ -7,19 +7,30 @@ Python API client for StackExchange APIv2.1
 ## Installation
 
 ### To Run
-	pip install pystex
+    pip install pystex
 
 ### To Develop
 Nothing specific now
 
 ## Usage
 
-	from pystex import Stackexchange
+    from pystex import Stackexchange
     from pystex import APIError
 
-	client = Stackexchange({Your API Key})
+    client = Stackexchange({Your API Key})
 
     try:
-	   result = client.users.get()
+       result = client.users.get()
     except APIError as e:
-        print e
+        print e
+
+In case of having variables for API calling. For example:
+
+    http://api.stackexchange.com/2.1/tags/python/top-answerers/all_time?pagesize=30&site=stackoverflow
+
+Please note the API **tags/{tag}/top-answerers** allow a tag to be a variable. In such cases. It's safe to use `__getattr__()` directly. The pystex for above example will be:
+
+    skill = 'python'
+    result = api_client.tags.__getattr__(skill).__getattr__('top-answerers').all_time.get(pagesize=30, page=1)
+
+It's also worth to note API url with hyphen isn't allowed in Python language, thus `__getattr__()` was used.

setup.py

@@ -14,7 +14,7 @@
 
 setup(
     name='pystex',
-    version='0.0.18',
+    version='0.0.19',
     description='Python StackExchange API Client',
     author='Steven Cheng',
     author_email='[email protected]',