Homestyx hydra

R1:86a00ee4abd6

Make Calendar ICS imports sort of work in a crude, approximate way

Summary: Ref T10747. This barely works, but can technically import some event data.

Test Plan: Used import flow to import a ".ics" document.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10747

Differential Revision: https://secure.phabricator.com/D16699
Repository: R1 hydra
Commit Date: Oct 12 2016