02_18_2014 - Added levels five and six.
02_18_2014 - Updated .gba file.
02_18_2014 - Commented main, myLib, and levels files.
02_18_2014 - Preliminary Shop implemented.
02_18_2014 - Implemented bonus money from hit rate percent.
02_18_2014 - Added ability to give ship bullets a horizontal velocity.
02_18_2014 - Refactored weapon costs into their own functions.
02_18_2014 - Ship now shoots 1-3 bullets based on weapon upgrade level.
02_19_2014 - Updated README with file structure explanation.
02_19_2014 - Separated shop functionality into it's own file.
02_19_2014 - Normalized drawShip function with other drawing functions. Cleaned up unnecessary global strings.
02_19_2014 - Created drawBullet to match other drawing functions.
02_19_2014 - Moved sprite pictures into their own file.
02_19_2014 - Updated read me with new file structure.
02_19_2014 - Updated weapon damage upgrades to new upgrade path format and prepared code for other upgrades.
02_19_2014 - Multishot bullet upgrades now available in shop.
02_20_2014 - Fixed upgrade path bug where indexes didn't reset when restarting the game.
02_20_2014 - Fire rate upgrades implemented in shop. Does not affect actual fire rate yet.
02_20_2014 - Ship now shoots bullets based on fire rate attribute.
02_20_2014 - Updated enemy health to be more balanced with new ship power.