adding setup notes for getting started with ubuntu

doc/setup-notes-ubuntu.md

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+I got my application running on ubuntu. Here are my notes:
+
+Prerequisites:
+
+* rvm installed with ruby 2.0.0
+* bundler installed
+* postgres installed
+
+Switch to ruby 2.0.0 and install gems: 
+
+    rvm use 2.0.0
+    bundle install
+
+Create a postgres user (with db create permissions but no user create permissions):
+
+      sudo -u postgres createuser -d -A -P username
+
+Resources for postgres on ubuntu: 
+
+* https://help.ubuntu.com/community/PostgreSQL
+* http://www.davidpashley.com/articles/postgresql-user-administration/
+
+
+Setup the database credentials for the application:
+
+* Create a folder named "secure" outside of rails root
+* Copy config/database.yml to /secure/database.yml
+* Configure the database.yml with your database name, user name and password
+
+Database setup (develpment and test):
+
+    bundle exec rake db:create
+    bundle exec rake db:schema:load
+    RAILS_ENV=test  bundle exec rake db:schema:load
+
+Run the tests:
+
+      bundle exec cucumber features
+      bundle exec rspec spec
+
+
+