Add VMFA Event Sources

[NatVIII]

Is your feature request related to a problem? Please describe.
Add the VMFA's events calendar to rva.rip

Describe the solution you'd like
I've already reached out to VMFA staff and have heard back, apparently there's a couple different options available! Just writing this down for posterity; I should acknowledge though that I might have to build a new system for intaking these events but I'm very willing to do so.