Add example database.yml

Author: dschweisguth

README.rdoc

@@ -149,9 +149,11 @@ Rails as of Rails 3.0.3, so we hope it will get rectified at some point.
 
 === Development and support
 
-==== Set-up
+==== Setup
 
-Create a test database configuration file <tt>test/database.yml</tt> with the following content (replace with proper dbname/username/password):
+Create a test database configuration file <tt>test/database.yml</tt> with the following content.
+If you like you can copy <tt>test/database-example.yml</tt> to <tt>test/database.yml</tt>.
+Replace the database, username and password with correct values.
 
     adapter:   mysql2spatial
     encoding:  utf8

test/database-example.yml

@@ -0,0 +1,8 @@
+# Copy this file to database.yml in the same directory and fill in the empty fields
+adapter: mysql2spatial
+encoding: utf8
+reconnect: true
+host: localhost
+database:
+username:
+password: