Enable Arduino Mega pins 44,45,46 + checksum calc fixes

[nelgi]

• Fixed Arduino MEGA pins 44 and 45 not working
• Fixed Arduino MEGA pins 44, 45, 46 not working correctly (low range, inconsistent payload)
• Fixed Toshiba Daiseikai checksum calculation
• Adjusted Toshiba Daiseikai timings, pause space was for some reason mostly omitted, atleast on my Arduino MEGA, after the changes, pause space is never omitted, the proposed timings are verified with remote WH-H05JE on both: Raw-IR-decoder-for-Arduino and IRrecvDumpV2 from the IRremoteESP8266 project.

[ToniA]

Thank you :)