Adjusted code to activate the respective decimal-point LED when a key is pressed.
Adjusted code to increment counter only when counter input pin is activated.
Refactored counter module to use some static functions.
Adjusted comments in init().
Added comments to main() and init().
Made use of display functions go through macro constants in init() and main().
Made counter have a public reset method. Adjusted code in main to reset counter when switch 1 or 2 is pressed.
Added some doxygen documentation to pins.h and disp_macros.h.