2010-06-06 Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* analysis-tools.h (analysis_tools_data_regression_t): new field
	* analysis-tools.c (analysis_tool_regression_engine_run): use
	  analysis_tool_get_function
	(analysis_tool_regression_simple_engine_run): use
	  analysis_tool_get_function and obey the new multiple-y setting.

2010-06-06 Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* regression.glade: add new checkbox and move the selectors for
	  the type of regression ahead of the input fields.
	* dialog-analysis-tools.c (regression_tool_ok_clicked_cb):
	  handle multiple-y
	(regression_tool_update_sensitivity_cb): ditto
	(dialog_regression_tool): ditto
	(regression_tool_regression_radio_toggled_cb): new
	(regression_tool_regression_check_toggled_cb): new