2010-06-25  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* src/Makefile.am (undo.[ch]): added
	* src/commands.h: formatting
	* src/commands.c (cmd_resize_colrow_*): deleted
	(cmd_resize_colrow): reimplement using GOUndo.
	* src/colrow.h (colrow_get_sizes): new
	(colrow_index_list_copy): new
	* src/colrow.c (colrow_restore_state_group): don't destroy the indexlist.
	  Adjust all callers
	(colrow_get_sizes): new
	(colrow_index_list_copy): new