Fixes android-async-http#287

Author: smarek

library/src/com/loopj/android/http/SyncHttpClient.java

@@ -3,6 +3,7 @@
 import android.content.Context;
 import android.os.Message;
 
+import org.apache.http.HttpEntity;
 import org.apache.http.client.methods.HttpUriRequest;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.protocol.HttpContext;
@@ -100,6 +101,11 @@ public String put(String url) {
         return result;
     }
 
+    public String post(String url, HttpEntity entity){
+        this.post(null, url, entity, null, responseHandler);
+        return result;
+    }
+
     public String post(String url, RequestParams params) {
         this.post(url, params, responseHandler);
         return result;