minor fix:
1. adjust to openshift database environment.
	1. create an rails + mysql app
	2. git remote add openshift ssh://53c927f94382ec5214000014@testyourcode-lynxwang.rhcloud.com/~/git/testyourcode.git/
	3. git push openshift
	4. rhc set-env RAILS_ENV=development
	5. rhc app restart -a testyourcode
	6. visit website!
2. fix small typo error.