v0.3.0-rc3

Changes since v0.3.0-rc2:

Aaron Huslage

Generate more generic certificates that can have other uses.

Amy Lindburg

Update ROADMAP.md

Evan Hazlett

added deprecation comment
bump: version 0.3.0-rc3
provisioning: update rpms for RC3
vbox: allow specifying host only adapter cidr
vbox: fix panic with custom cidr
vbox: refactor random IP allocation to func
virtualbox: check for hostonly iface and add if needed on start
windows: error message if using powershell/cmd and none specified

Mary Anthony

Closes #1329 when merged Updating links Updating with the comments from the team
Tweaking the language to the 1288 work DigitalOcean is one word Entering comments and killing nits Fixing the OSX wagon

Nathan LeClaire

Check for IP to be assigned before returning from Start()

Truman Ling

Update documentation for adding parameter --openstacke-availability-zone