2001-07-18   Andreas J. Guelzow  <aguelzow@taliesin.ca>

	* src/analysis-tools.c (set_cell) : Catch NULL string pointer.
	(get_data_grouped_by_cols) : new routine to read data from cell range.
	(get_data_grouped_by_rows) : ditto
	(get_text_col) : ditto
	(get_text_row) : ditto
	(kurt) : removed, use range_kurtosis_m3_est instead.
	(skew) : removed, use range_skew_est instead.
	(summary_statistics) : rewritten to use range_*, to use correct data
	  labels and to check for errors.
	(confidence_level) : ditto
	(kth_largest) : ditto
	(kth_smallest) : ditto
	(range_min_k) : new function to find kth smallest number (rather than
	  the code twice)
	(descriptive_stat_tool) : rewritten to use correct data labels and to
	  use above modified functions.

	* src/analysis-tools.h (range_min_k) : new prototype

	* src/dialogs/dialog-analysis-tools.c : include selection.h
	(dialog_descriptive_stat_tool) :  preload descriptive statistics input
	  range and add checkbox to specify row labels

	* src/dialogs/tools.h (descriptive_stat_tool) : add labels_flag

2001-07-18  Jody Goldberg <jgoldberg@home.com>

	* configure.in : AC_DEFINE ENABLE_EVOLUTION if it is available.