jpegtran: äldre versioner att ladda ner

jmorecfg.h: add JPEG_DATA_PRECISION parameter alongside and independent of BITS_IN_JSAMPLE, enabling higher bit depth support with backward compatibility and preparing the next standard for file interchange.\nAdd lossless negate function in jpegtran. Thank to Ulf-Dietrich Braumann for suggestion.\nEnable processing of images using reversible color transform with various bit depths by jpegtran.\nAdd Windwos 64 Bit (Modern) platform support in the C++Builder/RAD Studio build, remove ARM (32-bit) platform support in the Visual Studio build.