Add postman collection

Docs/GAP.FaceDetection.postman_collection.json

+{
+	"info": {
+		"_postman_id": "c70608f8-e28a-4795-97b3-e5decad6ca59",
+		"name": "GAP.FaceDetection",
+		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
+	},
+	"item": [
+		{
+			"name": "DetectFacesInImageUrl",
+			"request": {
+				"method": "POST",
+				"header": [],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n    \"imageUrl\": \"https://res.cloudinary.com/demo/image/upload/butterfly.jpg\"\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "{{Azure}}/api/DetectFacesFromImageUrl?code={{FunctionKey}}",
+					"host": [
+						"{{Azure}}"
+					],
+					"path": [
+						"api",
+						"DetectFacesFromImageUrl"
+					],
+					"query": [
+						{
+							"key": "code",
+							"value": "{{FunctionKey}}"
+						}
+					]
+				}
+			},
+			"response": []
+		}
+	],
+	"event": [
+		{
+			"listen": "prerequest",
+			"script": {
+				"type": "text/javascript",
+				"exec": [
+					""
+				]
+			}
+		},
+		{
+			"listen": "test",
+			"script": {
+				"type": "text/javascript",
+				"exec": [
+					""
+				]
+			}
+		}
+	],
+	"variable": [
+		{
+			"key": "Azure",
+			"value": "https://func-face-detection.azurewebsites.net/"
+		},
+		{
+			"key": "FunctionKey",
+			"value": "hwXIEFN9BcKvAlIh9jxcwfI5wQl6DDPi4jaP59ItMtiDaakrZkNj0w=="
+		}
+	]
+}
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