Merge branch 'master' into develop

Author: hathach

.travis.yml

@@ -26,11 +26,12 @@ before_install:
     - source install.sh
 
 install:
-    - arduino --install-library "Adafruit SPIFlash","Adafruit QSPI","SdFat"
+    - arduino --install-library "Adafruit SPIFlash","MIDI Library"
+    - git clone --quiet https://github.com/adafruit/SdFat.git $HOME/Arduino/libraries/SdFat
     - pip3 install --user adafruit-nrfutil
 
 script:
-    - build_samd_platforms
+    - build_m4_platforms
     - build_nrf5x_platforms
 
 # Generate and deploy documentation