Merge pull request #2 from AKWEXV/demo-auth

Add demo-auth application
Update README
Rename README to README.md
Update README.md
Update README.md
Update README.md
Update some REST service into exceedvote app.
Update REST service, and add initial data for app.
Update new auth procedure
Add access-control
Bug fixes
Add route for logout
Update models.
Add libraryDependencies -> mysql connector, Temporary delete Vote class
Add authentication, Add example authentication for service
Update README.md
Update models for voting.
Merge branch 'authentication'

Conflicts:
	exceedvote/app/models/User.java
	exceedvote/app/models/Vote.java
	exceedvote/conf/evolutions/default/1.sql
Update a lot of RESTful service.
Update authentication in vote.