+ added gradient check before light calculation;
+ circles now indicate where lights are located when in lighting mode;
+ added controls section to README;
+ added tool icon in lower-left for better usability;
* renamed light.size to light.radius for clarity;
* organised lighting.frag into functions;
* changed to use 'out vec4 fragColor' rather than deprecated gl_FragColor;
- removed uApple & uSmoothShadows shader uniforms (no more manual toggling of soft/hard shadows);

a0.10_3 Cleanup - renamed files more appropriately, removed rainbow shader, removed player controller, reduced reptitive code, utilised switch cases; added viewer mode & ability to move lights with middle-click

0.10_2 MacOS patch; gl_FragCoord does not work as expected on Macbook - added bool to configure shader at runtime for Macbook & added static_cast()s to stop clang whining

a0.9_0 2D lighting algorithm w/ fixed radial gradient; 'maze' starting image for canvas; code cleanup - removed walls tool & added ability to change brush size

a0.6_0 Added 'wall' tool; renamed run.sh to build.sh which can be ran with  to run the subsequent binary file; organised mouse & keyboard inputs and UI rendering into their own functions

a0.5_2 Updated README; downgraded CMake to latest stable version; changed  to create  if it does not exist; cleaned game.cpp code; updated drawing behaviour to work better

Basic shader setup - added 'res' folder w/ frag shader & run.sh for convenience among other small changes