Gui update

• change/add views.py for new screens (+ refactoring of methods)
• change/add view templates with new styling and design
• added DIAS css styling
• updated logo
• refactored javascript functionalities:

1. update workflow to a script file; more read-able + enables caching
2. formatting data sizes in views.py
3. creating filter element for post method

Still TODO (but not now):

[ ] modal overlay hides list view (index template) which is should not

[ ] re-directs after logout not good

[ ] instead of refreshing add to every row a data-id to poll the statuses with jquery

[ ] add action buttons to list view (index) like 'send to ATDB'