Add scenario to Troubleshooting section for when an SSH binary is not found during "vagrant ssh"
Add scenario to Troubleshooting section for when an SSH binary is not found during "vagrant ssh"

This is a combination of 2 squashed commits:

Add scenario to Troubleshooting section for when an SSH binary is not found during "vagrant ssh"
Fix table of contents bug which is causing the first header to not display

william-c-martin-iii/rails-app-dev-box,bill-c-martin/rails-app-dev-box