[feature] Fix png crc signature of each chunk while writing (#6)

* a fish, a fish, a fishy-oh!

* fix png crc while writing

* prove that the fish is clean

* update to latest go-png-image-structure version

* set scanner error via pipewriter, removing need for logging

* update go version, instead of allocating new zeroed data just clear() existing

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Co-authored-by: kim <grufwub@gmail.com>

[feature] add webp support (#4)

[bugfix] Pad missing JPEG bytes out to expected file length (#3)

* tidy up a little bit

* pad out before EOI to expected file size

* add test case for missing bytes

[feature] Preserve orientation data in JPEGs (#2)

* go mod tidy

* add test image with orientation data

* add panorama test

* start work on preserving orientation for jpegs

* go fmt

* add spec pdf

* write orientation nicely

* update tests

* add runnable example code

* update readme

test giant turnip

First working version (#1)

* use pipereader + pipewriter

* test updates

* testing visitor function

* hey it works

* pngs working

* rename license