1.3c: gotta go slightly faster

mini 1.3c is out and for all platforms this time! mostly bug fixes and small improvements, once again.

for mac & linux users, here's what you missed in 1.3b:

• most microphone issues should be gone :] it should now detect the volume correctly.
• transparent GIFs are now actually transparent, instead of having a blinking background.
• i tried to fix file opening on mac as much as i could; i'd blame apple at this point, but i'll continue investigating nonetheless.

and now for the new stuff in 1.3c:

• PNGs have been optimised and now they load like 9x faster than before! this applies to animated PNGs too.
• when an animated image (GIF or APNG) is set as the blinking image, the blink duration follows the image duration :] this should make the blinking feature more useful.
• minor improvements towards performance (it should run slightly better) and memory (it should waste less RAM).

in other news, thanks for the donations here so far! mini will continue being updated as bugs are fixed and other misc things get improved, regardless of the full version. just don't expect new features! remember that mini is supposed to be mini. xo