add documentation for git push and use heroku open to view app

Author: mck-

README.md

@@ -31,17 +31,18 @@ To avoid trouble with SBCL source encoding use: ```heroku config:add LANG=en_US.
 
 And deploy:
 
-    git push heroku
+    git push heroku branch
 
-That's it!
+Where you should replace *branch* with the branch of your choice. There are currently 2 branches. *Master* has Huchentoot specific code and *aserve* has AllegroServe specific code.
+
+That's it! Use `heroku open` to view your app in your browser!
 
 ## More details:
 
-There are currently 2 branches. *Master* has Huchentoot specific code and *aserve* has AllegroServe specific code.
 Currently https://github.com/jsmpereira/heroku-buildpack-cl let's you run Hunchentoot with SBCL and CCL and AllegroServe(portableaserve) with CCL.
 
 There is a pending issue with [acl-compat](https://github.com/mtravers/portableaserve/tree/master/acl-compat) bundled with portableaserve preventing use with SBCL. Look [here](https://github.com/mtravers/wuwei/issues/10) for more information.
 
 The file heroku-setup.lisp gets loaded at compile time, and needs to load any Lisp files or packages required.
 
-Thanks to [Mike Travers](https://github.com/mtravers) for getting Common Lisp on Heroku.
+Thanks to [Mike Travers](https://github.com/mtravers) for getting Common Lisp on Heroku.