Add sample4 with template

Adding README.md files

+#  Sample1. Creating ubuntu instance using one file
+
+```
+# setup your AMS access parameters in ~/.aws
+
+# Init terraform 
+terraform init
+# Create instance
+terraform apply
+```
+
+# Terraform would produce the state file terraform.tfstate

+#  Sample2. Creating ubuntu instance using set of files
+#  AMI selection moved to separate ami.tf
+#  Instance settings parametized by terraform variables
+#  Created variable files: terraform.tfvars, variables.tf
+#    
+
+```
+# setup your AMS access parameters in ~/.aws
+
+# Init terraform 
+terraform init
+# Create instance
+terraform apply
+```

+## Get instance AMI
+data "aws_ami" "xpdays-ami" {
+  most_recent = true
+  filter {
+    name   = "name"
+    values = ["xpdays-ami*"]
+  }
+}

+#!/bin/bash
+hostname ${instancehostname} && hostname > /etc/hostname
+echo "127.0.0.1 localhost `hostname`" > /etc/hosts
+cd /home/ubuntu
+git clone https://bitbucket.org/bohdaq/wisehands.me.git
+cd /home/ubuntu/wisehands.me/ && play deps
+mkdir -p /home/ubuntu/wisehands.me/modules/guice-1.2
+cd /home/ubuntu/wisehands.me/modules/guice-1.2
+wget https://www.playframework.com/modules/guice-1.2.zip
+unzip guice-1.2.zip
+sed -i 's/mysql-database-endpoint/${dbendpoint}/g' /home/ubuntu/wisehands.me/conf/application.conf
+cd /home/ubuntu/wisehands.me/ && play run
+

+## Define provider
+provider "aws" {
+	region = "${var.region}"
+}
+
+# Template for initial configuration bash script
+data "template_file" "init" {
+  template = "${file("init.tpl")}"
+  count = "${length(var.instance_suffix)}"
+  
+  vars {
+    dbendpoint="${aws_db_instance.db-instance.username}:${aws_db_instance.db-instance.password}@${aws_db_instance.db-instance.endpoint}\\/${aws_db_instance.db-instance.name}"
+    instancehostname="xpdays-${var.instance_suffix[count.index]}-${count.index}"
+  }
+}
+
+# Define the instance
+resource "aws_instance" "xpdays-instance" {
+    ami = "${data.aws_ami.xpdays-ami.id}"
+    vpc_security_group_ids = [ "${var.vpc_security_group_ids}" ]
+    instance_type = "${lookup(var.instance_type, var.environment)}"
+    user_data = "${data.template_file.init.*.rendered[count.index]}" 
+
+    tags {
+        Name = "xpdays${count.index + 1}"
+    }
+
+    count = "${length(var.instance_suffix)}"
+}
+
+## Print Output
+output "xpdays_instance_public_ip" {
+	  value = "${join(",",aws_instance.xpdays-instance.*.public_ip)}"
+	
+}

+resource "aws_db_subnet_group" "default_db_subnet_group" {
+  name       = "main"
+  subnet_ids = ["${var.default_db_subnet_group_subnet_ids[var.region]}"]
+  tags {
+    Name = "Default DB subnet group"
+  }
+}
+
+resource "aws_db_instance" "db-instance" {
+  allocated_storage    = 10
+  storage_type         = "gp2"
+  engine               = "mysql"
+  engine_version       = "5.7.17"
+  instance_class       = "db.t2.micro"
+  name                 = "wisehandsdb"
+  username             = "root"
+  password             = "53N4CsNmQrxh2"
+  db_subnet_group_name = "${aws_db_subnet_group.default_db_subnet_group.id}"
+  final_snapshot_identifier = "snapshot-defaultdbinstance${count.index + 1}"
+  skip_final_snapshot  = true
+  publicly_accessible  = true
+  tags {
+      key   = "Name"
+      value = "default-db-instance${count.index + 1}-${var.environment}"
+    }
+}
+
+output "database_endpoint" {
+  value = "${aws_db_instance.db-instance.username}:${aws_db_instance.db-instance.password}@${aws_db_instance.db-instance.endpoint}/${aws_db_instance.db-instance.name}"
+}

+# String
+region = "eu-central-1"
+
+# List
+vpc_security_group_ids = [ "sg-84e649ed", "sg-90ea45fa" ]
+
+# Map
+instance_type = {
+     production = "t2.micro"
+     development = "m3.medium"
+}
+
+# Map of Lists
+default_db_subnet_group_subnet_ids = {
+     eu-central-1 = [ "subnet-f1e92d8a", "subnet-304b7f7a" ]
+     eu-west-1 = [ "subnet-f1e92d8a", "subnet-304b7f7a"  ]
+}
+
+#
+instance_suffix = ["a","b"] 

+variable "region" {
+  type        = "string"
+  default     = "eu-central-1"
+  description = "The AWS region"
+}
+
+variable "environment" {
+  description = "The Environment Type"
+  default     = "production"
+}
+
+variable "default_db_subnet_group_subnet_ids" {
+  type    = "map"
+  default = {}
+}
+
+variable "vpc_security_group_ids" {
+  type    = "list"
+}
+
+variable "instance_type" {
+  type    = "map"
+  default = {}
+}
+
+variable "instance_suffix" {
+  type = "list"
+  description = "Add instance suffix"
+}
+