Do org-mode practices

Org-mode related prelimnary practices are done here. These includes
two compulational document, one for R, and another for python. It is
possible to merge them together, of course, if needed.

journal/Readme.md

@@ -75,4 +75,7 @@
 ## Module 2
 ### Introduction
 ### Emacs as a computational environment
-
+- Can run multiple types of codes R, Python, bash etc.
+- Can export to varient of format
+- Harder to learn initially due to key-bindings
+- Very customizable and very efficient