Update README.md file to include Change log info

- Change log info includes update or changes happened for code commit
  for significant updates. So allow users to rebuild app as necessary if
  they want to include such feature.

  Note that this is due to the project encourages users to build the
  project to their device themselves in which the project might not make
  official release.

README.md

@@ -32,6 +32,10 @@ Potatso has in total 33 (2 as submodules dependencies as used as local file in C
 
 The project is tested with Xcode 8.2 (8C38) on iOS 10.2 (14C92) device with cocoapod version `1.1.1`+.
 
+## Change log
+
+You can take a look at [Change log](https://github.com/haxpor/Potatso/wiki/Change-log) for changes that has made for specific commit that has significant updates. Thus you can freely decide whether you want to rebuild Potatso to include such update or not.
+
 ## How to Build Project
 
 Perform the following steps to be able to build the project.