Add sample database config file

.gitignore

@@ -8,3 +8,4 @@ coverage/
 .approvals
 *.received.txt
 config/site.rb
+config/database.yml

config/database-example.yml

@@ -0,0 +1,23 @@
+---
+common: &common
+  adapter: postgresql
+  encoding: unicode
+  host: localhost
+  pool: 5
+  username: grove
+
+production:
+  database: grove_production
+  password: 
+  <<: *common
+
+development:
+  database: grove_development
+  password: 
+  <<: *common
+
+test:
+  database: grove_test
+  password: 
+  min_messages: WARNING
+  <<: *common