structure not extendible

[glensc]

i don't think the structure you use is extendible, i.e add attributes from environment, add more attributes from role, override in node

"pkgs"  : [
    { "name"    : "tree",
      "action"  : "upgrade"
    },
    { "name"    : "stow" }
  ]

i propose the has structure, package name being the key:

"pkgs"  : {
    "file" : {},
    "meh" : {
      "version": "1.2alpha1"
    },
    "tree" : {
      "action"  : "upgrade"
    },
    "cuckoo" : {
      "action": "remove"
    },
    "stow" : false
  }

using false (or maybe also nil, null) is way of telling, hey override merged results telling hey don't do anything with that one