Pass certificate to POST request

Even though it doesn't seem to required it pass the user certificate
when registering for a dataset.
Change error dialog to Bootstrap modal
Merge remote-tracking branch 'origin/169-cert-on-post'
Merge remote-tracking branch 'origin/167-error-to-bootstrap'
Default sh is not bash on ubuntu anymore
Merge remote-tracking branch 'origin/170_fix_runtime_ubuntu'