Minor enhancements

Get rid of NonfatalException (an exception is nonfatal iff it is
catched somewhere)

Foreport fixes for #26 and #30.

The current __sersion__ string is now kept in instaloader.py rather than
setup.py. This lets instaloader.__version__ always deliver the version
of the actually-loaded Instaloader module.

Minor changes to README.rst, error handling and which class methods are
public.

With these and the changes of the previous commit, we saved 31 lines of
code, indicating that it might be easier to understand and to maintain.

README.rst

@@ -234,12 +234,12 @@ For example, to get a list of all followees and a list of all followers of a pro
     # Login
     loader.interactive_login(USERNAME)
 
-    # Retrieve followees
+    # Print followees
     print(PROFILE + " follows these profiles:")
     for f in loader.get_followees(PROFILE):
         print("\t%s\t%s" % (f['username'], f['full_name']))
 
-    # Retrieve followers
+    # Print followers
     print("Followers of " + PROFILE + ":")
     for f in loader.get_followers(PROFILE):
         print("\t%s\t%s" % (f['username'], f['full_name']))
@@ -248,11 +248,8 @@ Then, you may download all pictures of all followees with
 
 .. code:: python
 
-    for f in followees:
-        try:
-            loader.download_profile(f['username'])
-        except instaloader.NonfatalException:
-            pass
+    for f in loader.get_followers(PROFILE):
+        loader.download_profile(f['username'])
 
 You could also download your last 20 liked pics with
 
@@ -296,4 +293,6 @@ Disclaimer
 ----------
 
 This code is in no way affiliated with, authorized, maintained or endorsed by Instagram or any of its affiliates or
-subsidiaries. This is an independent and unofficial project. Use at your own risk.
+subsidiaries. This is an independent and unofficial project. Use at your own risk.
+
+Instaloader is licensed under an MIT license. Refer to ``LICENSE`` file for more information.