Exercise "genlist" part 1: simple generic list

input: irregular table:
-1.23     23.4 	   	 456.7
  	     0.07   			      -7.4e8 	 6.72
0.53 23.4 4.5

output: regular table:
-1.23e+00  2.34e+01  4.57e+02 
 7.00e-02 -7.40e+08  6.72e+00 
 5.30e-01  2.34e+01  4.50e+00 

implicit cast to array...
printing array as: System.Double[][]
-1.23	23.4	456.7	
0.07	-740000000	6.72	
0.53	23.4	4.5