Added example for importing security group (GoogleCloudPlatform#1201)

* Update azure_service.go

Added Duplicate check method to avoid error having same name in different Resource group or at sub level

* fixed duplicate issue

* fixed duplicate issue

* fixed duplicate resource for nsg

* fixed virtual network duplicate resource issue

* Update virtual_network.go

* Update azure.md

Added example to get details for specific Resource Group

* Update azure_service.go

Using id instead of random number

* Update aws.md

* Updated Readme.md for windows installation

Updated Readme.md for windows installation

* Update aws.md

docs/aws.md

@@ -22,6 +22,15 @@ terraformer import aws --resources=cloudfront --profile=prod
 ```
 In that case terraformer will not know with which region resources are associated with and will not assume any region. That scenario is useful in case of global resources (e.g. CloudFront distributions or Route 53 records) and when region is passed implicitly through environmental variables or metadata service.
 
+Examples to import other resources-
+
+ * Security Group-
+```
+terraformer import aws --resources=sg --regions=us-east-1
+```
+
+
+
 #### Supported services
 
 *   `accessanalyzer`