I made some changes

Implemented

* nice, more clear design (try to use bourbon + neat)
* migrate to rails 4
* fixed broken dependency in Gemfile
* changed tabs to spaces and removed tailing spaces
* Heroku online demo
* personolized shopping cart
* updated Readme
* and other small things

![screen shot 2013-09-20 at 2 11 15 pm](https://f.cloud.github.com/assets/26019/1178882/47067e56-21c3-11e3-8a2c-79df5b1eb8db.png)
![screen shot 2013-09-20 at 1 36 12 pm](https://f.cloud.github.com/assets/26019/1178883/47377056-21c3-11e3-8ed0-4a3312ffdd7d.png)


Things to-do:

* Find correct `server_host` for `veritrans.yml`.
* Test payment
* Refactor veritrans_controller.rb and describe it in Readme
* Readme in english and indonesian