Adding some notes about how to deploy and how to clean

CONTRIBUTING.md

@@ -29,6 +29,18 @@ bundle install
 bundle exec middleman
 ```
 
+## Deploying
+
+If you're lucky enough to be one of our deployers, then just run the following
+command from master branch... and MAKE SURE YOUR WORKING COPY IS CLEAN!
+
+```
+rake deploy
+```
+
+It's that easy.
+
+If something goes wrong, make sure to run `rake clean`
 
 Thanks!
 

Rakefile

@@ -75,5 +75,10 @@ task :upload do
   sh %{git checkout master}
 end
 
+task :clean do
+  sh %{rm -rf .sass build}
+end
+
 desc "Deploy the site to heroku."
 task :deploy => [:build, :upload]
+task :deploy_clean => [:clean, :build, :upload]