Changed initialize to use aws_access_key_id and aws_access_secret_key methods.
Merge pull request #37 from landonclark/master

Changed initialize to use aws_access_key_id and aws_access_secret_key me...
Updated changelog and version for v1.5.0.pre2.
Add to_s to fix error when using stages.

Error that was occurring previously:
capify-ec2.rb:143:in `desired_instances': undefined method `empty?' for
:prod:Symbol (NoMethodError)
Make ec2:ssh use the ssh key if configured
Fix for 'ec2:ssh' command when using stages
Merge pull request #40 from UseAllFive/to_s-fix

Add to_s to fix error when using stages.
Merge pull request #39 from UseAllFive/ec2-ssh-stages-fix

Fix for 'ec2:ssh' command when using stages
Merge pull request #38 from UseAllFive/ec2-ssh-key-fix

Make ec2:ssh use the ssh key if configured
Fix issue with .empty? on a symbol.
Updated changelog and version for v1.5.0.pre3, resolves #38, resolves #39 and resolves #40.
Updating changelog and version for v1.5.0.
Handle cases where the EC2 instance 'name' tag is empty.
Updated changelog and version for v1.5.1. Resolves #42.
Clarify use of shorthand role definitions.
Merge remote-tracking branch 'upstream/master'