Prepare 0.3

In 0.3, there are some incompatible changes. So, I created a pull request to help migration.

First, I couldn't run and even compile this project because of some errors
* Could not find artifact embeddedtc-maven-plugin:pom:1.0.0-SNAPSHOT
* Access denied to: http://repository.rasc.ch/resources/extjs/4.1.3/extjs-4.1.3.pom

What I did:
* Modularize application
* replace @ Handler(url) with @ Bean(beanName)
* replace @ Name(roomName) with @ Wire(beanName)

However, there may be some compilation errors. I ask for your understanding.

Thanks,