[KNIFE-468] Remove "this option recently changed" message.
Merge pull request #210 from juliandunn/KNIFE-468

[KNIFE-468] Remove "this option recently changed" message.
Added columns: AZ and VPC; made image and key optional; color-coded machine flavors and AZs; Display group ids if machine is in a VPC.
Authored
Added optional 'tags' column
Made root dev an optional column; Consolidated Name/Desc; Added server.platform to arch column.
Added subnet id to private IP column in cases where there is one
Enabled bootstrapping using only user_data (without ssh)
Made the logic around the bootstrap object less confusing
Added unit tests
Push user data to S3 first and use a signed URL to bootstrap from, thus avoiding leaving sensitive data in the user_data field forever.
Updated unit tests to work with S3 bootstrap process
Added VPC name to output
Add auto monitoring config; Fix subnet parser to always show subnet with deviceindex 1
Switched to Gemfury as source
Renamed knife-ec2 to et-knife-ec2
Fully integrate Gemfury
Version bump and add more verbose information about the SSH connection being waited for
Linting fixes and add version constraint to aws-s3
Switch to using EverTrue's Gemfury, add back Rubygems as source