Update Virtualbox download note to 4.2.16, add guinea pig warning.

4.2.14 broke Vagrant in a very annoying way, forcing anyone that had upgrade or installed the latest to roll back to 4.2.12. Thankfully, 4.2.16 was just released and resolves this issue.

Added a referencing the older downloads page just in case a new release comes out and somebody finds these instructions before we have properly tested things.

Closes #90
Agent Forwarding
Updated contributors list.
Updated inline documentation in Vagrantfile
Remove poor attempt at Bootstrapifying the dashboard.

This was poor judgement. We should have a vision for the dashboard screen before we start assinging styles to it. I think this was me being lazy.

I'm pulling this out in advance of the 0.8 release. We should have a dashboard discussion in an issue.
Silence network check output

Do a better job of checking the string from our ping check so that it doesn't spew junk all over the provisioning screen. Much more pleasant.
Clean up some service restarting output
Organize database import output to be more readable
More indention on package installation output. Clean like.
Ship v0.8, updated README and CHANGELOG
Update master to 0.9-working
VVV confirmed to work with Vagrant 1.2.3
Update WP stable as WP trunk is updated
Fix tab indentation
Use spaces for indents and add EOF newline
VVV confirmed to work with Vagrant 1.2.4
Merge remote-tracking branch 'xteam/stable-wp-core-update'
Listen for HTTPS requests and generate SSL cert
Update contributors list
Add 'listen 443 ssl' to local-nginx-example.conf-sample