[RPL/2] RPL/2 4.0.17

[BERTRAND Joel]

	Hello,

	New release that fixes a lot of bugs :

- BACKTRACE intrinsic is added;
- major bug is fixed in SELECT/DEFAULT/END conditional structure. Only 
occurs when this structure is included in IFERR/THEN/END structure and 
when an error is caught;
- major bug is fixed in analyse() subroutine. When evaluation() returned 
error in a compiled program, analyse() caught this error twice and 
randomly aborted with a segmentation error;
- TRIM and TOKENIZE replace both '\n' and '\t' by regular spaces;
- ATEXIT subroutine begins with an implicit CSTOP to avoid multiple stop
signals;
- memory leak is fixed in ROW+. It only occurs when a row is added to an 
empty matrix.

	Regards,

	JKB