Missing MIT license after commit a4e19c7

[Torxed]

In the recent commit a4e19c7 the deprecated/deleted project https://cdnjs.com/libraries/myforce-angularjs-dropdown-multiselect was "removed" in the sense that the code was copied in to this repo.

angularjs-dropdown-multiselect was under MIT license, the hmdm-server is under Apache 2.0 license.

Legally I think this project is now required to use dual licensing, and having LICENSES/ directory might be a simple solution.