v1.0-beta.3

• Starting experimenting with Windows support
• buildbox-agent build-meta-data has been renamed to: buildbox-agent build-data
• buildbox-agent artifact has been renamed to: buildbox-agent build-artifact
• The --url parameter has been renamed to --endpoint and the ENV variable BUILDBOX_AGENT_ENDPOINT
• No longer add EC2=true if you're using --meta-data-ec2-tags
• Fixed places where the agent should disconnect