simplified design of level by removing the code creation of objects
changed movement buttons to use the lateral sides of the game level
Played with a smaller van, looks much better. It is now 48 pixels.
grouped some scripts and added enemy elements handler prototype handler for level
tested project for .gitignore file on empty directories
Added enemy movement, generation and destroy prototype
Added basic functionality
Tested project, works ok
Merge pull request #3 from lcuadrado/20141116

Basic functionality release