Initial commit
Create entire files to execute simple web service on sinatra.
Add database settings
Switch configuration from RAILS_ENV environment variable
Move duplicate logic to common helper
Add license commend on Rakefile
Add 'console' task with database connection on Rakefile
Add system model and readonly REST API
Use json parser when content type is "application/json"
Move logic what to load external library to common loader
Add sinatra-reloader to support hot deploy
Use sinatra/json to return json string from API
Add API as "POST /systems" to create system entry.
Restrict mass-assignment to suppress vulnerability by strong parameters
Add rspec to execute unit test
Add guard settings to execute spec automatically
Refactoring: Delete unnecessary code
Add spork to suppress that reload 3rd party libraries for each rspec running.
Add debugger for ruby 2.x
Add pry-doc module to reference documents.