natep-tech

Completes #344 This takes an array of DateTimes that should be excluded from the schedules, like University holidays [(calendar link here)](https://www.rit.edu/calendar), and adds it to the generated iCal files so...

After opening the "Show X Results" dropdown, I'd like to be able to deselect all of the options with one click. That way if there's many sections, you can choose...