fix the following error:

/home/rackhuber/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/json/common.rb:146:in `encode': "\xE7" on US-ASCII (Encoding::InvalidByteSequenceError)
	from /home/rackhuber/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/json/common.rb:146:in `initialize'
	from /home/rackhuber/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/json/common.rb:146:in `new'
	from /home/rackhuber/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/json/common.rb:146:in `parse'
	from okinawarb.rb:11:in `block in <main>'
	from /home/rackhuber/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/open-uri.rb:35:in `open'
	from /home/rackhuber/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/open-uri.rb:35:in `open'
	from okinawarb.rb:10:in `<main>'
add sample config
add Gemfile and test scripts for Facebook/Twitter.
change yaml
work only sunday
add config.yml for Okinawa.rb
update on monday
fix encoding
fix encoding
fix day
Merge usr-yaml-for-config branch into master
Make a sample better and add comments