Added an About section to README and a To Do list.
Cleaned up the code a bit, no major changes. Also added a few goals into the README
created a readPin function for future flexiblity for customizability. Not implemented yet. Also added more goals
Incorporated customizability into project. Customizable Sensor Pins+Types done, buttonPin and ledPin also done, sensorReferenceArray added still has work to do. Also updated README.md accordingly.