V0.4.1

General:

• Fix compiler warnings
• Replace deprecated attribute ICACHE_RAM_ATTR by IRAM_ATTR
• Update Arduino IDE setup scripts to cover version 3.1.2 of ESP8266 board package

README.md:

• Mention version of Arduino IDE
• Refer to ESP8266 board package version 3.1.2

src/VanBusRx.h:

• Add a few IDENs to be recognized by TVanPacketRxDesc::IsSatnavPacket

src/VanBusRx.cpp:

• Remove unused code "flip three equal bits in a row" (seen this only once, ever)
• Add and invoke new method TVanPacketRxDesc::CheckCrcFix
• Try to handle bit deletion errors

examples/PacketParser:

• Various small fixes and updates
• Add example of log output
• Prevent RX queue overrun