Project stucture changed to avoid symbolic links

The pom.xml file was changed. The packaging was changed to war instead of jar.
In addition to this disableClassMetaData, disableCastChecking and enableClosureCompiler were set to true.

The compiled files can be found in target/javaraytracerdemo-1.0-SNAPSHOT
Merge pull request #7 from timeu/master

Project stucture changed to avoid symbolic links