Bower install note with latest versions

[JeanPerriault]

Hello,
I've understood you've removed bower references from READme (following bower recommendations), but I just wanted to add a note for those still stuck using bower.
The dist build has moved to its dedicated folder with latest releases of this package, so in order to include it, it is now needed to add an exportOverride rule in bower configuration file:

In bower.json file:

...
"exportsOverride": {
  "js-untar": {
    "js": "build/dist/untar.js"
  },
}