Adding test for DRD example

Author: witnessmenow

.travis.yml

@@ -11,6 +11,7 @@ cache:
 env:
     - SCRIPT=platformioSingle EXAMPLE_NAME=ChannelStatistics EXAMPLE_FOLDER=/ BOARDTYPE=ESP8266 BOARD=d1_mini
     - SCRIPT=platformioSingle EXAMPLE_NAME=ChannelStatisticsWithWifiManager EXAMPLE_FOLDER=/ BOARDTYPE=ESP8266 BOARD=d1_mini
+    - SCRIPT=platformioSingle EXAMPLE_NAME=ChannelStatisticsWithWifiManagerAndDoubleReset EXAMPLE_FOLDER=/ BOARDTYPE=ESP8266 BOARD=d1_mini
 
 
 install:
@@ -22,5 +23,7 @@ install:
     - platformio lib -g install 64
     # http://platformio.org/lib/show/567/WifiManager
     - platformio lib -g install 567
+    # Double Reset Detector (not yet on PIO)
+    - platformio lib -g install https://github.com/datacute/DoubleResetDetector.git
 
 script: scripts/travis/$SCRIPT.sh