Update homebrew release docs.

`brew bump-formula-pr` has simplified the process for updating brew
forumla

docs/development/homebrew.md

@@ -4,22 +4,37 @@ Submitting a new release of kops to Homebrew is very simple.
 
 ### From a homebrew machine
 
-```brew edit kops``` will open an editor on your machine to edit the formula. Make the following changes:
+`brew bump-formula-pr` makes it easy to update our homebrew formula. 
+This will automatically update the provided fields and open a PR for you. 
+More details on this script are located [here.](https://github.com/Homebrew/brew/blob/master/Library/Homebrew/dev-cmd/bump-formula-pr.rb)
+
+Example usage:
+```
+brew bump-formula-pr \
+       --url=https://github.com/kubernetes/kops/archive/1.7.1.tar.gz \
+       --sha256=044c5c7a737ed3acf53517e64bb27d3da8f7517d2914df89efeeaf84bc8a722a
+```
 
 * Update the URL variable to the tar.gz of the new release source code
 * Update the sha256 variable to SHA256 checksum of the new tar.gz
 
 **If we change how dependencies work or if we make the install require something other than a simple make, we'll need to update the commands**
 
+```brew edit kops``` will open an editor on your machine to edit the formula. 
+You can use this to make more in depth changes to the formula.
+
 ### Test that Homebrew formula works
-```brew uninstall kops && brew install kops``` will install the new version. Test and make sure that the new release works.
+```brew uninstall kops && brew install kops``` will install the new version. 
+Test and make sure that the new release works.
 
 ### Audit the Homebrew formula
 ```brew audit --strict --online``` will output any code that that doesn't meet the Homebrew standards.
 
 ### Send a commit to the Homebrew repo
 
-Rather than repeating documentation that might change, head over to [Homebrew documentation](https://github.com/Homebrew/brew/blob/master/docs/Formula-Cookbook.md#commit) for directions and conventions.
+Rather than repeating documentation that might change, head over to 
+[Homebrew documentation](https://github.com/Homebrew/brew/blob/master/docs/Formula-Cookbook.md#commit) 
+for directions and conventions.
 
 
 The formula can be found in hacks/brew/kops.rb.