change tags output to be formatted as 'key: value' instead of current 'keyvalue' due to a hash being printed with puts
Merge pull request #126 from opscode/adamed-knife-290

KNIFE-290: Format output tags as 'key: value' instead of current 'keyvalue' due to a hash being printed with puts
Update lib/chef/knife/ec2_server_create.rb

Also rescue Error::ECONNRESET during the "Waiting for sshd .." message
Merge pull request #127 from opscode/adamed-knife-254

KNIFE-254: Rescue Error::ECONNRESET during the "Waiting for sshd .." message
Add support for specifying an EC2 placement group when spinning up a new machine
Add tests and update Gemfile to include dependencies