update features and todo

README.md

@@ -20,12 +20,14 @@ $ ./rush
 ```
 
 # Features
+- No dependencies except a compiler
 - Showing current time and directory with custom color
 - Syntax highlighting on valid commands using ANSI colors
 - History navigation using up and down keys with history command
 - Built in commands
 - Export environment variable
 - Source commands from a file
+- Editing using left and right arrow keys
 
 # Built in commands
 - cd
@@ -36,16 +38,14 @@ $ ./rush
 - source
 
 # Todo Features
-- Pipe
+- splits commands based on pipes and whitespaces
 - stdin, stdout, stderr redirect
 - background jobs
-- editing using left and right arrow keys
 - tab completion
+- Recalling history through `!` & ~ `!-`
 
 # Credits
 - [Tutorial - Write a shell in C](https://brennan.io/2015/01/16/write-a-shell-in-c/)
 - [dash](https://github.com/danishprakash/dash)
 - [Shell assignment](https://www.cs.cornell.edu/courses/cs414/2004su/homework/shell/shell.html)
 - [khol](https://github.com/SanketDG/khol/)
-
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