added heroku gem, slugignore, and heroku rake task to load application.yml vars as config vars

.slugignore

+features
+spec

Gemfile

@@ -4,6 +4,7 @@ gem 'rails', '3.0.10'
 
 gem 'bundler', '>= 1.0.0'
 gem 'foreman'
+gem 'heroku'
 
 gem 'thin', '1.2.11', :require => false
 

Gemfile.lock

@@ -209,6 +209,11 @@ GEM
       json (>= 1.4.6)
     haml (3.1.2)
     hashie (1.0.0)
+    heroku (2.6.1)
+      launchy (>= 0.3.2)
+      rest-client (~> 1.6.1)
+      rubyzip
+      term-ansicolor (~> 1.0.5)
     highline (1.6.2)
     hoptoad_notifier (2.4.11)
       activesupport
@@ -493,6 +498,7 @@ DEPENDENCIES
   foreman
   fuubar
   haml (= 3.1.2)
+  heroku
   hoptoad_notifier
   http_accept_language!
   i18n-inflector-rails (~> 1.0)

lib/tasks/heroku.rake

+namespace :heroku do
+  task :config do
+    puts "Reading config/application.yml and sending config vars to Heroku..."
+    CONFIG = YAML.load_file('config/application.yml')['production'] rescue {}
+    command = "heroku config:add"
+    CONFIG.each {|key, val| command << " #{key}=#{val} " if val }
+    system command
+  end
+end