CSV Support

[jsfillman]

To facilitate easier pattern generation & editing, configure ability to import csv files and assign to slots.

For example, you could set a patterns rate to 4, aka 16th note resolution.
Then the csv column headers could be: 1, E, AND, A, 2, E, AND, A and so on.

(See Everything you need to know about The “1 E & A” Counting System.)

Might also be good to make the first column "Pattern", so you could have separate patterns on each row.

[jsfillman]

On second thought, let's make it go down columns for timing, and do measure e.g.: "1:0, 1:1....1:16 (assuming 16th note resolution).