Created the models that represent substations and their components.

- Reverted MongoDB changes and updated the requirements file.
- Created the Substation, Pipeline, Device, and Command models.
- Renamed the default local_settings.py file.
- Updated migrations.
Merge branch 'station_models' into develop
Defined the admin panel styles.

- Improved the administration panel layout.
- Finished style updates for Django admin elements.
- Added initial navigation to the administration panel.
- Added Glyphicons to the project.
- Fixed login page password field type.
Added admin navigation translations.

- Added translations to admin navigation menu.
- Moved error_list background declaration to main SCSS file.
Added custom filter and search form templates for the admin panel.

- Worked on admin panel styles.
Merge branch 'admin_panel' into develop
Updated the WSGI script.