[Ecls-list] Latest changes

[Juan Jose Garcia-Ripoll]

* Printer:

 - Readtables have a new flag that makes them read-only. Function
	(si::readtable-lock readtable &optional new-flag)
   either reads the state of this flag (if NEW-FLAG is missing) or
   also sets it.

 - The compiler now uses cl_core to efficiently access certain lisp
   constants (standard packages, standard readtables, etc)

 - WITH-STANDARD-IO has been optimized to use PROGV
   and a fixed set of constants

 - PROGV has been optimized factoring the code in a single
   and efficient function.

-- 
Instituto de Física Fundamental, CSIC
c/ Serrano, 113b, Madrid 28006 (Spain)
http://juanjose.garciaripoll.googlepages.com