base: licence headers for less templates

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
base/deposit: assets 3.0

* Removes bower.json as it is currently generated by inveniomanage.

* Adapts less import paths to the new directory structure.

* Updates paths in bundles files.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>