added travis build script

.travis.yml

@@ -0,0 +1,4 @@
+language: ruby
+rvm: 2.1
+before_script:
+  - psql -c  'create database justask_test;' -U postgres

Gemfile

@@ -71,6 +71,7 @@ group :production do
 end
 
 group :development, :test do
+  gem 'rake'
   gem 'thin'
   gem 'rspec-rails', '~> 3.0.0'
   gem 'factory_girl_rails', require: false