Better closing of resources (closes #11)

Author: manavo

src/main/java/io/doorbell/android/manavo/rest/RestRequest.java

@@ -258,16 +258,21 @@ private Bundle executeRequest(HttpRequest request) {
             Header contentEncoding = response.getFirstHeader("Content-Encoding");
             if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
                 InputStream instream = entity.getContent();
-                instream = new GZIPInputStream(instream);
+                GZIPInputStream gzipInputStream = new GZIPInputStream(instream);
 
-                InputStreamReader reader = new InputStreamReader(instream);
+                InputStreamReader reader = new InputStreamReader(gzipInputStream);
                 BufferedReader in = new BufferedReader(reader);
 
                 String readed;
                 responseData = "";
                 while ((readed = in.readLine()) != null) {
                     responseData += (readed);
                 }
+
+                in.close();
+                reader.close();
+                gzipInputStream.close();
+                instream.close();
             } else {
                 responseData = EntityUtils.toString(entity);
             }