[PD] [ANN] New External: tglgrid, a togglable grid of cells

[Nick Lanham]

Posting here too since I got a lot of silence on pd-dev.  From the README:

A tglgrid is a grid of cells that can each be toggled on and off. It can 
be instantiated with different dimensions depending on your project's 
needs. You can bang the left input to output a list of the active cells 
in the currently active column and send a column number to the right 
input to select the active column.  Cells can also be toggled and/or 
turned on/off by sending messages: "tgl col row", "on col row", or "off 
col row".

Right now this has only been tested on linux. I would appreciate any 
reports about success and/or failure of running this in other environments.

The github page is here: https://github.com/nicklan/tglgrid You can find 
screenshots there if you're interested.

As this is my first external, I'm sure I've made some horrible 
coding/design mistakes and appreciate any feedback in that regard.

Cheers!

-Nick