Update CHANGELOG.md

[ci skip]
For visual sanity, no versioning or releases needed.
Add ability to enable detailed CloudWatch monitoring for the current instance.
update README with volume_type for gp2, fix minor text items in CHANGELOG
adding test-kitchen skeleton
Merge pull request #60 from miketheman/patch-1

Update CHANGELOG.md
Adding a starting point for testing aws cookbook
Adds ubuntu and elastic_ip tests
Adds elb tests
Add a check for the resource_tag
Add a test for s3_file
Merge pull request #85 from opscode-cookbooks/cwebberOps/testing_improvements

Adding a starting point for testing aws cookbook
Add ec2 hints recipe
Merge pull request #89 from opscode-cookbooks/cwebberOps-ec2_hints

Add ec2 hints recipe
Merge pull request #74 from drewrothstein/master

update README with volume_type for gp2, fix minor text items in CHANGELOG
Merge pull request #65 from astral303/enable_monitoring

Add ability to enable detailed CloudWatch monitoring for current instance
Adds a test for verifying detailed monitoring
Merge pull request #90 from opscode-cookbooks/cwebberOps-add_instance_monitoring_testing

Adds a test for verifying detailed monitoring
v2.5.0 Release
Merge remote-tracking branch 'upstream/master'
Use aws-sdk v 2