Thanks for the tip mate. Unity support will come in a near future so you don't need to set up yourself everything ^^
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Awesome, that is swell to hear.
Not to tell you your business, but in case you didn't know, Unity by default renames the individual sprites by the Spritesheet file name and a _0, _1, _2 and so on and so forth, left to right, top to bottom. As such if you are planning to make sprite sheets specifically for unity putting each animation frame next to each other allows for them to be easily sliced into 32 x 32 frames and then animated without renaming the frames individually.
*Disclaimer, I know very little on pixel art/sprite sheet creation you would know better what is feasible for you. So disregard this advice if it suits you to do so