removed unmanaged dependencies and point everything to bower

= relative urls
changed relative urls to absolute urls

= leaflet
leaflet dont include their build in dist. that's why I used node_modules
I had to change L.Icon.Default.imagePath because it was pointing to leaflet.label plugin

= leftovers
jquery vector map dont provide a build so it's still an unmanged dependecy
bootstrap dark & light: custom css for kibana ?