Make xcape [file] work like xmodmap [file]

[michaelmrose]

Basically xmodmap supports interactive use with -e like xcape but also allows you to create a file with each line being similar to what you would pass in via -e. Thus instead of making say a super long expression listing 6 keys is easy to have a singular file and add to or edit it.

[tkaden4]

I've taken care of this in my fork. I'm just doing some touching up but it should cover the functionality you are looking for.