Huge Blynk Library update! v0.5.0 [Arduino, PlatformIO, Particle, MBED, OpenWrt]

[vshymanskyy]

Reminder for those who switched to ESP8266 Core v2.4.0:

Be careful of this new/corrected bug in 2.4.0 Arduino Core

@mikekgr Workaround described here: https://github.com/blynkkk/blynk-library/issues/384#issuecomment-355850531