Release mega-20180428
Changes in mega-20180428 (since mega-20180426):
ESPEasy release bot (1):
automaticly updated release notes for mega-20180428
TD-er (4):
[wifi] Attempt to make event based wifi simpler
[PlatformIO] Updated core to 2.4.1
[wifi] Just disconnect when DNS lookup is not possible
[Wifi] Avoid doing network communications when not connected.