chore(ec2): add m4 instance types

Author: wgrrrr

contrib/ec2/deis.template.json

@@ -40,6 +40,11 @@
         "m3.large",
         "m3.xlarge",
         "m3.2xlarge",
+        "m4.large",
+        "m4.xlarge",
+        "m4.2xlarge",
+        "m4.4xlarge",
+        "m4.10xlarge",        
         "m1.medium",
         "m1.large",
         "m1.xlarge",