Release mega-20180217
Changes in mega-20180217 (since mega-20180214):
Bartłomiej Zimoń (1):
provide System@Sleep event (#875)
ESPEasy release bot (2):
automaticly updated release notes for v2.0-20180214
automaticly updated release notes for mega-20180217
Gijs Noorlander (4):
[issue 866] Try to stop logging to serial when serial is not read. (#868)
[issue #853] Favicon.ico (#874)
[OLED Framed] ESP Easy logo (#876)
[issue #869] Added 'LWT' to last will topic and improved CPU load (#883)