list:
1.	move all _dos_XXX calls into XXXdir calls for portability.
2.	Avoid unnessary code of file manipulation used in maker.c, in
	 extra extentions.
3.	check portability using compilation under HighC 3.31 ( DOS ).
4.	check portability using compilation under CC ( UNIX ).
5.	General code cleanup.
6.	Porting to SunOS using CC.
7.	-r flag changes the default name of the compilers_run_directory.
8.	-Nabort_cd_compilers_run_directory.
8.	Save memory in the DOS versions by using a private memory management
	routines for the local hash table.

actions:
1.	Done in version 3.52 .
2.	Done in version 3.52 .
3.	Done in version 3.53 .
4.	Done in version 3.52 .
5.	continous .
6.	Done. Unix versions are easy to provide, since I got a LINUX one.
7.	
8.	
