1999-05-27  Jukka-Pekka Iivonen  <iivonen@iki.fi>

	* src/fn-stat.c: Added BETAINV() and CHITEST().  Added optional
 	parameters A and B to BETADIST().  Implemented non-cumulative case
 	of NORMDIST().  Implemented cumulative case of POISSON().  Fixed
 	CHIDIST(), CHIINV(), FDIST(), FINV(), and TDIST() to return the
 	complement of the probablity.  It looks like TINV() is still
 	broken after file restructurations.