:: a -> BlockTable a
	
	  So the cells can contain anything.
	
	> table2 :: BlockTable String
	> table2 = single "World"	+-----+
					|World|
					+-----+


	> table3 :: BlockTable String
	> table3 = table1 %-% table2	+-----%-----+
					|Hello%World|
	 % is used to indicate		+-----%-----+
	 the join edge between
	 the two Tables.  

	> table4 :: BlockTable String
	> table4 = table3 %/% table2	+-----+-----+
					|Hello|World|
	  Notice the padding on the	%%%%%%%%%%%%%
	  smaller (bottom)