Added alert for new versions

As a reminder, the latest version should be copied from here: https://script.google.com/d/1QeZFLSM1EkuFvYcryECI_xH-IZVe1-IxGRq_n6OoXp1CmVtSeTeigEx4/edit?usp=sharing

The program now has the ability to alert the user of new versions

Script overhaul and ICAL.js implementation

As a reminder, the latest version should be copied from here: https://script.google.com/d/1QeZFLSM1EkuFvYcryECI_xH-IZVe1-IxGRq_n6OoXp1CmVtSeTeigEx4/edit?usp=sharing

In this release issues with timezones were fixed (#3) and most of the custom, manual parsing code was replaced with ICAL.js, an open-source ICAL parsing library for JavaScript. Dependencies on Moment.js were removed and there are no longer dependencies on any external libraries (meaning that all code - even ICAL.js - is contained in the project).

First release

As a reminder, the latest version should be copied from here: https://script.google.com/d/1QeZFLSM1EkuFvYcryECI_xH-IZVe1-IxGRq_n6OoXp1CmVtSeTeigEx4/edit?usp=sharing

First release!

Currently supported:

• Syncing changes (adding, editing, & deleting) from an ICS/ICAL file to Google Calendar
• Already-existing events and manually-created events afterwards are not affected
• Event properties synced are Title, Description, Location, Time (obviously), and some notifications