Tweak format

README.md

@@ -1,12 +1,14 @@
 # Interpreter, Compiler, JIT
+
 This repository contains the programs used in Nick Desaulniers' [blog post](https://nickdesaulniers.github.io/blog/2015/05/25/interpreter-compiler-jit/); an interpreter, a compiler, and a Just In Time (JIT) compiler for the brainfuck language.  It is meant to show how similar these techniques are, and then improved by several students who learnt system programming to bring X86/ARM backend along with [DynASM](http://luajit.org/dynasm.html) support.
 
-###Portability
+## Portability
 While all three are written in C, only the interpreter should be portable, even to [Emscripten](https://github.com/kripken/emscripten).  The compiler and JIT is highly dependant on the specific Instruction Set Architecture (ISA), and Linux style calling convention.
 
-##Prerequisites
+## Prerequisites
+
 Development packages for Ubuntu Linux Ubuntu 14.04 LTS:
-```
+```shell
 sudo apt-get update
 sudo apt-get install build-essential
 sudo apt-get install gcc-4.8-multilib
@@ -15,30 +17,34 @@ sudo apt-get install gcc-arm-linux-gnueabihf
 sudo apt-get install qemu-user
 ```
 
-##Building
-```
+## Building
+
+```shell
 make
 ```
 
-##Running
-###The Interpreter
-```
+## Running
+### The Interpreter
+
+```shell
 ./interpreter progs/hello.bf
 ```
 
-###The Compiler
-```
+### The Compiler
+
+```shell
 make run-compiler
 ```
 
-###The JIT
-```
+### The JIT
+
+```shell
 make run-jit-x64
 make run-jit-arm
 make bench-jit-x64
 ```
 
-##License
+## License
 
 _Except_ the code in `progs/` and `dynasm/`, the JIT-Construct source files are distributed
 BSD-style license found in the LICENSE file.