docs: Prepare version 0.2.0 release notes

Change-Id: Ie390e902d8389f8554b62a1dbbb8fdb73772263b
diff --git a/setup.py b/setup.py
index 8f10b5e..8229d80 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 
 setup(
     name = "Mini-NDN",
-    version = '0.1.1',
+    version = '0.2.0',
     packages = find_packages(),
     scripts = ['bin/minindn', 'bin/minindnedit'],
 )