* 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