ADD option to only include RAM used column (omits Private and Shared)

[allanlaal]

Add a separate command line flag, so the output columns would only be RAM used and Program (and whatever new ones are added)

use case:

I only care about total RAM used per app

[pixelb]

You could take advantage of the alignment to do ps_mem | cut -b25-.
I suppose we could add an option to select columns (which would generalize -S that shows the swap column).
Re alignment we wouldn't be able to rely on alignment if we let users choose a unit (which is probably a good idea (as per issue #39))

[allanlaal]

@pixelb custom columns would still result in a known and repeatable alignment for those columns, no?

[pixelb]

Right. Alignment issues would only be for configurable units. Columns would not impact that