Add support for the Ohio region and recently released instance types.

This adds support for the newly released us-east-2 (Ohio) region, as well as
the followinng instance types in all the other regions where they are
available:
- m4.16xlarge
- p2.xlarge
- p2.8xlarge
- p2.16xlarge
- x1.16xlarge

Makefile

@@ -6,9 +6,7 @@ SHA=$(shell git rev-parse HEAD | cut -c 1-7)
 BUILD:=$(or ${TRAVIS_BUILD_NUMBER}, ${TRAVIS_BUILD_NUMBER}, ${SHA})
 
 # upstream data
-#INSTANCES_URL="https://raw.githubusercontent.com/powdahound/ec2instances.info/master/www/instances.json"
-# my Github fork
-INSTANCES_URL="https://raw.githubusercontent.com/cristim/ec2instances.info/master/www/instances.json"
+INSTANCES_URL="https://raw.githubusercontent.com/powdahound/ec2instances.info/37596e2/www/instances.json"
 
 all: build_local
 

core/autoscaling.go

@@ -406,9 +406,6 @@ func (a *autoScalingGroup) setAutoScalingMaxSize(maxSize int64) {
 		logger.Println(err.Error())
 		return
 	}
-
-	// Pretty-print the response data.
-	logger.Println(resp)
 }
 
 func (a *autoScalingGroup) bidForSpotInstance(