Created Request Matching JsonPathMatcher (markdown)

Request-Matching-JsonPathMatcher.md

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+### JSON Path (JsonPathMatcher)
+Deems a match if the attribute value is valid JSON and matches the JSON Path expression supplied.
+A JSON body will be considered to match a path expression if the expression returns either a non-null single value (string, integer etc.), or a non-empty object or array.
+
+#### C#
+```csharp
+var server = WireMockServer.Start();
+server
+  .Given(
+    Request.Create().WithPath("/some/thing").UsingGet()
+      .WithBody(new JsonPathMatcher("$.things[?(@.name == 'RequiredThing')]"));
+  )
+  .RespondWith(Response.Create().WithBody("Hello"));
+```
+
+#### JSON Mapping
+``` js
+{
+    "Guid": "e4a600b8-9d6f-453f-90c6-3db2b0885ddb",
+    "Request": {
+        "Path": {
+            "Matchers": [
+                {
+                    "Name": "WildcardMatcher",
+                    "Pattern": "/jsonpath",
+                    "IgnoreCase": false
+                }
+            ]
+        },
+        "Methods": [
+            "put"
+        ],
+        "Body": {
+            "Matcher": {
+                "Name": "JsonPathMatcher",
+                "Pattern": "$.things[?(@.name == 'RequiredThing')]"
+            }
+        }
+    },
+    "Response": {
+        "StatusCode": 200,
+        "BodyDestination": "SameAsSource",
+        "Body": "{ \"result\": \"JsonPathMatcher !!!\"}",
+        "UseTransformer": false
+    }
+}
+```
+
+```
+// matching
+{ "things": { "name": "RequiredThing" } }
+{ "things": [ { "name": "RequiredThing" }, { "name": "Wiremock" } ] }
+// not matching
+{ "price": 15 }
+{ "things": { "name": "Wiremock" } }
+```