Timestamp for funcube source IQ files

Author: ggajoch

gnuradio/downlink/source/funcube_source.grc

@@ -101,7 +101,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>iq_data_from_current_session_after_doppler_correction</value>
+      <value>"iq_data_from_current_session_after_doppler_correction_{}.dat".format(datetime.now().strftime('%Y%m%d_%H%M%S'))</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -148,7 +148,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>iq_data_from_current_session_raw</value>
+      <value>"iq_data_from_current_session_raw_out_{}.dat".format(datetime.now().strftime('%Y%m%d_%H%M%S'))</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -1069,6 +1069,37 @@
       <value>True</value>
     </param>
   </block>
+  <block>
+    <key>import</key>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(351, 67)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>import_1</value>
+    </param>
+    <param>
+      <key>import</key>
+      <value>from datetime import datetime</value>
+    </param>
+  </block>
   <block>
     <key>qtgui_waterfall_sink_x</key>
     <param>