First pass of evaluating cells using NumPy, bound to Ctrl+, =

Example data:

hello,col0,sdfadfasdf,col1,col2
aa,bb,,c,100.0
1,2,,3,24
4,3,,2,001
",a    ",b,,c,.45
,,,,
,,,0.45,"=<m[1:5,4].min()"