Rename the world class to level
Add new class for loading level data files
Add new functionality for loading and changing between levels
Fix the bug with the resource manager

Disposing of the resource manager caused the asset manager to be
disposed, and using a disposed asset manager isn't a very good idea.
Refactor some of the code
Add more level loading functionality
Add input processing functionality for entities
Add more level loading functionality

Ability to load texture atlases and create regions from loaded texture
atlases
Add animations for entities
Add animation loading functionality
Merge branch 'feature' of git@github.com:Niko113355/Pony-Game.git into feature
Bug fix animation loading
Add an ant build file
Add background and foreground layers loading functionality
Add a second test level

This test level is for testing out the loading of bg and fg layers and
their parallax values
Merge the main project with the level-editor project
Change entire project structure

Seperated the main project into two seprate ones, a core project and a
main game project. All sub-projects depend on the core.
Add ant build files
GPL + LGPL license inclusion
Merge pull request #2 from Niko113355/feature

Feature