Game now uses partially transparent images to denote completed
deliveries.

Some engine functions were commented out to improve performance.
Enhanced resetMap() function to reset all necessary constructs
for proper re-playability.

Also commented out another game engine function for minor
performance increase
Tint function no longer used, but its functionality is mimicked across fuel
stations as well as all other structures using translucent SVG images.

Minor bug fixes and optimizations.
Merge pull request #121 from Seneca-CDOT/issue101

Issue101