WPI's documentation has greatly improved in the recent years. As development environments often if not always vary year-to-year, we now recommend following the latest version of the guide for your system at FIRST's ReadTheDocs.
Note that because of the size of the official installer (over a gigabyte!), your past programming leads strongly recommend either downloading it beforehand onto a USB, or taking turns using the unthrottled Ethernet cables available in classrooms.
Team-specific configurations or those not covered by the official documentation will remain here.