With the new 1.6.x version of the Arduino IDE, obscurity of adding new chips has gained new level. It now seems you have to add HTTP links to some JSON files in single-line edit field in settings.
I did so and to add AtTiny to Arduino IDE, I used this JSON file: https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json
I have AtTiny 13 however. It's same as the others, according to datasheet, but has different signature:
avrdude: Expected signature for ATtiny45 is 1E 92 06 Double check chip, or use -F to override this check. Wrong microcontroller found. Did you select the right board from the Tools > Board menu?
I tried to search ATTiny45 and the signature over the files - no success.
What I need is to add the ATTiny13 to the list so that I can finally actually do some programming, instead of being completely helpless.