Update codebase to recover compatibility

[Fensterbank]

This pull request merges relevant commits from another fork to the main repository.
Source code is updated to ES2015+ and the packages are updated to the latest major version to recover compatibility with Node 7+.

Merging this pull request fixes #25 and makes #31 and #32 obsolete.

[Fensterbank]

missed a few things.

[Fensterbank]

now all things are done and the PR is ready to merge.
@wiedi would you please check this and the other pull requests?

[wiedi]

Hi, thanks for picking this up and apologies for the delay!

There's a lot going on in this PR.

• devices.js looks fine
• if we'd decide to ship an example dmx-web.json maybe better to rename the existing one?
• package.json - should not change the url, why is color-convert a dev-dependency?
• pliabAnim.js - what does "pliab" stand for? Maybe this deserves a note/example in the readme?

[Fensterbank]

Oh, yes. You're right.
It seems with the commits of thomfort we have a few more weird things we don't want or need. I did not notice this.
I think I will recreate my branch by concentrating on package upgrades and ignoring the other commits from thomfort. Stay tuned...

[Fensterbank]

Obsolete