Load dragula from NPM instead of Bower

[oskarrough]

As bower is being phased out of ember-cli we should move the dragula dependency to NPM. And make sure it is not loaded in Fastboot environments.

[kkincade]

Is there any plan to do this in the near future? Looks like the PR is ready.

[oskarrough]

@kkincade yes I started it here #30.

But I'm honestly not sure if I missed something. Ah, I merged it to master now to get the ball moving. Do you have the chance to test it out from master? Before we push a release, that is.

[ro0gr]

@oskarrough I think it doesn't work currently.

[ro0gr]

@oskarrough would you accept a pr fixing this?

[oskarrough]

@ro0gr definitely. A PR would be very much appreciated.