Added base Web App functionalities and models. Minor fixes.

images/webapp/code/rosetta/base_app/templates/success.html

images/webapp/code/rosetta/base_app/templates/tasks.html

images/webapp/code/rosetta/base_app/utils.py

images/webapp/code/rosetta/base_app/views.py

images/webapp/code/rosetta/settings.py

images/webapp/code/rosetta/urls.py

images/webapp/requirements.txt

images/webapp/run_webapp.sh

images/webapp/supervisord_dregistrytunnel.conf