Fixed package name and project refactoring

As a standard, package names should be in all lowercase and it is
recommended to use a reversed internet domain. I suggest
com.jadventure.game. I also tried to refactor the project folder
structure to a more recognized one. I added .classpath and .project
files for people using eclipse so that it is easier to open project.
This will also help people importing the project to IntelliJ or Netbeans
Merge remote-tracking branch 'upstream/master' into fixpackage

Conflicts:
	.gitignore
	src/main/java/com/jadventure/game/Player.java
Fixed build file for new project structure
Merge pull request #8 from CageHN/fixpackage

Fixed package name and project refactoring