Merge pull request #52 from TheWeatherCompany/support-iam-instance-profile

Support iam instance profile
Merge pull request #55 from TheWeatherCompany/support-iam-instance-profile

Support iam instance profile
Merge pull request #57 from greese/develop

Develop
Added i2 instance class. Added missing g2.2xlarge type. Changed ramSizeInMb to more accurately reflect use of gibibyte values. Note: cc1.4xlarge is still listed even though it's removed from ec2 product page. #58
Merge pull request #79 from TheWeatherCompany/i2-instance-types

Added I2 instance types and g2.2xlarge. Changed ramSizeInMb based on gibibyte values.