Deleted unnecessary include
Added definition for pixel_equals()
Fixed minor syntatical issues
Created file with equals() method
Added creation_test()
Switched #include to be more... inclusive!
Created grey_test() and shell for main method
Simplified pixel declaration in grey_test()
Added overlay_test()
Finised main method
Edit pixel_equals() to be more verbose
Had wrong order in creating test pixel
Uses double division/ round() to prevent incorrect trunctation