resolves #3 - Configured to use spring-framework.

 I want to resolve #3 in this commit that spring-framework can be used.

 Configured the projects are able to use spring-framework.
 And a few source codes were added to show a welcome page with spring-webmvc instead of removed index.jsp.

 A JUnit class was created to test new controller class.
 Although controller testing requires 'spring-test' APIs, 'spring-test' depends on servlet-api 3.0 or higher, so 'servlet-api 3.0' was added as dependency module for testing.
 
 To confirm the new welcome page requires a few steps below:
- Compile and install application the application into your system.
- Llaunch the devserver.
- access to a url 'http://localhost:8080/' or 'http://localhost:8080/index' and will show the message 'Welcome to Lasagna Italiana.'