1.3.0 ATTinyCore (for manual installation)

This release adds two exciting new features - a menu option to enable/disable the millis/micros timer (in order to save flash), and a new highly integrated tinyNeoPixel library that supports all clock speeds from 7.3728MHz and up. See the documentation ( https://github.com/SpenceKonde/ATTinyCore/blob/master/avr/extras/tinyNeoPixel.md ) for details.
This release also corrects a few issues:
digitalPinToInterrupt for INT0 on 841/441 was still not correctly fixed in 1.2.5; now it is.
Correct issue with slave mode on chips with slave-only hardware I2C.

The board manager release will include some significant board manager fixes as well.