Release mega-20180130

Changes in mega-20180130 (since mega-20180126):

ESPEasy release bot (2):
      automaticly updated release notes for v2.0-20180126
      automaticly updated release notes for mega-20180130

Edwin Eefting (1):
      forgot to commit last framed oled display fix

Gijs Noorlander (3):
      Bugfix/issue 740 allow mqtt as controller 2 3 (#785)
      [#784] Add %rssi% as system variable (#786)
      [Log] Clean up of log routines and more intuitive log level input (#788)