Don't read config.yml anymore

add some heroku support gems and document all the new variables

config/environment.rb

@@ -3,11 +3,18 @@ require File.expand_path('../application', __FILE__)
 
 # Load the configuration file
 path = Rails.root.join('config', 'config.yml')
-begin
-  CONFIG = YAML.load_file(path)[Rails.env]
-rescue
-  puts "Error while parsing config file #{path}"
-  CONFIG = {}
+if File.exist?(path)
+  puts "
+
+WARNING: The OSEM configuration file
+
+#{path}
+
+is deprecated. Please use the environment environment variables
+explained in INSTALL.md instead.
+
+
+"
 end
 
 # Initialize the rails application