treeform 5e484ad4ab

Resurrect old nim-native jpeg parser and fix most issues (#414) ...

* Add new jpeg tests.
* Resurrect old jpeg.
* Fix Jpeg grayscale
* Fix 4:1:1 scaling.
* Better chunk scanner.
* Fight progressive.
* Fight restart markers.
* Jpeg can now parse all of the test files.
* Fuzzing and overflow checks
* Make getBits* the only way to read the bits. 
* Make Quantiziation and IDCT happen only in one place.
* Rename jpg folder to jpeg

2022-05-05 09:19:17 -07:00

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