First import.
Minor improvements.
First operational version wrt Peter Münster previous c pretty printer.
Pdf output added for later reference.
u-pretty-c renamed to t-pretty-c as suggested by Hans. Colors are now protected using the C prefix.
The test file now use t-pretty-c instead of u-pretty-c.
Color abstraction.
Peter Münster credit added.
Colors definitions has been simplified using \setupcolor[ema].
TDS-compliancy.