Merge pull request #1425 from AlejandroFNadal/master

Adding section for memory allocators and adding a first tutorial for it

README.md

@@ -21,6 +21,7 @@ It's a great way to learn.
 * [Front-end Framework / Library](#build-your-own-front-end-framework--library)
 * [Game](#build-your-own-game)
 * [Git](#build-your-own-git)
+* [Memory Allocator](#build-your-own-memory-allocator)
 * [Network Stack](#build-your-own-network-stack)
 * [Neural Network](#build-your-own-neural-network)
 * [Operating System](#build-your-own-operating-system)
@@ -239,6 +240,10 @@ It's a great way to learn.
 * [**Python**: _ugit: Learn Git Internals by Building Git Yourself_](https://www.leshenko.net/p/ugit/)
 * [**Ruby**: _Rebuilding Git in Ruby_](https://robots.thoughtbot.com/rebuilding-git-in-ruby)
 
+#### Build your own `Memory Allocator`
+
+* [**C**: _Malloc is not magic -- Implementing your own memory allocator_](https://medium.com/p/e0354e914402)
+
 #### Build your own `Network Stack`
 
 * [**C**: _Beej's Guide to Network Programming_](http://beej.us/guide/bgnet/)