2009-06-05  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* analysis-tools.h (gnm_fourier_fft): moved to
	  plugins/fn-tsa/functions.c
	* analysis-tools.c (cb_store_data): deleted
	(new_data_set): deleted
	(destroy_data_set): deleted
	(cb_get_data_set_list): deleted
	(cb_get_data_set_list): deleted
	(new_data_set_list): deleted
	(destroy_data_set_list): deleted
	(gnm_fourier_fft): moved to
	  plugins/fn-tsa/functions.c
	(analysis_tool_fourier_engine_run): rewritten
	(analysis_tool_fourier_calc_length): use analysis_tool_calc_length
	(analysis_tool_fourier_engine): adjust required size

2009-06-05  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* functions.c (gnm_fourier_fft): moved here from
	  src/tools/analysis-tools.c
	(help_interpolation): changed to new form of desription
	(help_periodogram): ditto
	(help_fourier): new
	(gnumeric_fourier): new
	(TimeSeriesAnalysis_functions): added fourier function
	* plugin.xml.in: added fourier function