Fix/update bower.json

[BrodaUa]

Hello, thank you for the package.

But, please, update your bower.json file. It fails to setup the lib properly since your actual *.js file is dist/angular-word-cloud.js , while the reference in bower.json points to: "main": ["dist/angular-d3-word-cloud.js"].
It took quite a while to notice this nasty small typo.

For those who unable to use the lib right now, try to use overrides in the main bower.json file of the project like this:

 "overrides": {
    "angular-d3-word-cloud": {
      "main": [
        "dist/angular-word-cloud.js"
      ]
    }
  }