Added subcommand ('one') to 'archive' in ostool for archiving a single dataset
Users have to provide dataset name (identifier) as argument. By default dataset is archived to a folder with the same name (but can be overwritten with the optional argument --output)
Allow importing of more than one source via the csvimport command of ostools and allow files as well as urls
Removed line overwriting the views. The model views is a different thing than the visualisation views so they shouldn't be overwritten.
Archive visualisations (widgets) as well into their own file (visualisations.json)
Make it possible to import visualisations when import csv files
Restructuring/refactoring of the importer so that it now sets the correct urls based on the archive model (even though it imports from a file). Visualisations are now also fully importable.
Fixes #490 in issue tracker on github.
Merge branch 'master' into 490-copy-complete-dataset