Updated Vagrant configuration to fix Virtualbox support
Updated Vagrant configuration to fix VMWare, Update /docs to fix typos, formatting. Replace todos with coming soon verbiage, etc.

Summary: Update /docs to fix typos, formatting. Replace todos with coming soon verbiage, etc.

Test Plan: Look over changes, try running on VMWare elsewhere.

Reviewers: charles

Differential Revision: https://review.inboxapp.com/D208
Updating the documentation to separate "getting started" and "api" docs into folders, updating copy