More optimisations
Merge branch 'master' of ssh://github.com:22/xcore/sc_dsp_transforms

* 'master' of ssh://github.com:22/xcore/sc_dsp_transforms:
  Fixing build with 12.2 tools
  updated the readme
  improved clipping and added readme
  made faster and cleaner
  added an implimentation of a compact jpeg decoding library