Feature/toolbar/diy wrapper (hubertokf/vue2-leaflet-draw import)

[saku-koodari]

This "wrapper" is basically vue2-leaflet-draw as a my own vue component.

What I did:

• Copied the src and the LICENSE of vue2-leaflet-draw](https://github.com/hubertokf/vue2-leaflet-draw)
• rn App.vue => LeafletDrawToolBar.vue
• convert all L.* references into window.L
• EditAction.js: Changed (around row:10) var action = this into

  var action
  action = this

  My npm compiler threw an errror about that. It's possible that there is other similar issues there, where you need to do the same fix.

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It's not the desired solution since i have to 'keep' his code under my version control. But this seems to be the only viable option with my project