Added Awesome CTF Cheatsheet. (apsdehal#136)

* Added Awesome CTF Cheatsheet.

* Update README.md

* Update README.md

Author: Saikiran Uppu

README.md

@@ -380,6 +380,7 @@ Check solve section for steganography.
 
 *Various general websites about and on CTF*
 
+- [Awesome CTF Cheatsheet](https://github.com/uppusaikiran/awesome-ctf-cheatsheet#awesome-ctf-cheatsheet-) - CTF Cheatsheet.
 - [CTF Time](https://ctftime.org/) - General information on CTF occuring around the worlds.
 - [Reddit Security CTF](http://www.reddit.com/r/securityctf) - Reddit CTF category.