supporting Wifi credentials with special character

.travis.yml

@@ -13,7 +13,7 @@ script:
 - platformio run
 deploy:
   provider: releases
-  prerelease: true
+  # prerelease: true
   api_key:
     secure: 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
   file: ".pioenvs/d1_mini_stage/firmware.bin"

README.md

@@ -36,6 +36,7 @@ Check out *IOT DEVICE PULLS ITS WEIGHT IN HOME BREWING* at http://hackaday.com/2
 
 ## News
 
+> 02.02.2018 Firmware 5.6.1: Support for Wifi credentials with special characters
 > 07.11.2017 Firmware 5.6.1: Restoring Wifi credentials, moved to HTTP client library, improved RFCAL resilience to gain more stable Wifi connection   
 > 17.10.2017 Firmware 5.5.4: Various fixes for CraftBeerPi, BrewPiLess and Ubidots   
 > 28.09.2017 Firmware 5.5.0: Recall saved Wifi credential thus persisting over configuration changes