[RPL/2] RPL/2-4.00pre8k

[BERTRAND Joël]

	Hello,

	New release 4.00pre8k. Some stuffs are added and bugs are fixed:
	
- segmentation fault occurs in both PROMPT and INPUT when readline return
NULL (ctrl^D). This trouble is now fixed;
- major bug is fixed in DATE intrinsic (julian days and reduced julian days);
- stderr of rplpp is now catched;
- SYSEVAL is modified to use stdin, stdout and stderr:
ESSAI
<<
    // Only stdout and stderr
	"ls" dup disp syseval
	clmf
	// Now with stdin ("zer\naze\n")
	{ "cat" "zer" "aze" } dup disp syseval
	clmf
>>
- GSL is upgraded to 1.7.

	Regards,

	JKB