Merge pull request #1 from Mrgadgetz/master

Added .gitignore and README.md files.  Removed IDE specific files and folders.
Fixed layering problem

When moving the level from being drawn separately from the collector to
the collector, I forgot that the level was then being drawn after all
the enemies, so I changed that and made all on layer 0.

Also starting to add items, slowly, but getting there
Merge pull request #2 from Mrgadgetz/master

Added .gitignore file that was not added in previous commit.
Added comments on World class and added a for loop on collision detection + few other things