Making 'scipion demo' mode more general in order to be used in real acquisitions.
Enabling 'scipion demo /some/path/to/a.json.template' in order to launch a given template(s).
BugFix when one wants to take the home dir in browser (before this PR, one must go for a certain folder and come back, now it directly works after clicking 'goHome').
Asking if you want to overwrite when a workflow.json already exist. If not, show again the browser in the last directory.
Git-ignoring json.templates (except for demo.json.template).