Move molgenis/molgenis-app-compute-db & molgenis/molgenis-compute-core to molgenis/molgenis-compute repository

Move molgenis/molgenis-app-compute-db & molgenis/molgenis-compute-core modules to new molgenis/molgenis-compute repository so that all developers can build the molgenis/molgenis repository without errors if they are not on a linux or mac operating system or don't have a local compute database running (http://www.molgenis.org/ticket/1938)

+ add license file for molgenis