Load CIM from remote URL

We should have an option to load CIM files from a remote URL.

I propose to use a special URL parameter to automatically load CIM files from a URL:

Example: http://web.pintura.fein-aachen.org/index.html?load=http%3A%2F%2Fweb.villas.fein-aachen.org%2Ffiles%2F2736501827364081237%3Ftoken%3D2189346129346123