Standardizes Readme to Spaces

While updating the readme, there was inconsistency between tabs and spaces
this makes it all-spaces, which is in alignment with the JS standards for
the project. (Plus, mixing the two is some horrible form of evil)

README.md

@@ -42,7 +42,9 @@ If this project is missing an API or command line flag that has been added to [l
 
 ## Install
 
-    npm install node-sass
+```
+npm install node-sass
+```
 
 Some users have reported issues installing on Ubuntu due to `node` being registered to another package. [Follow the official NodeJS docs](https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager) to install NodeJS so that `#!/usr/bin/env node` correctly resolved.
 
@@ -64,7 +66,6 @@ var result = sass.renderSync({
 ```
 
 ### Options
-
 The API for using node-sass has changed, so that now there is only one options hash. In the options hash, some items are optional, others may be mandatory depending on circumstances.
 
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