First commit -- basic files to play with chartkick

using code from: http://stackoverflow.com/questions/23238671/sinatra-and-chartkick-example
Change example to use local variables from controller in view

- change example to Taiwan ethnic group stats
- app.rb: setup instance vars in controller
- index.erb: use @title, @data, @source
Merge with remote 'origin/master'

- adds README.md
- adds LICENSE