Added swid measurement controller
Added software-id field to model and updated swidimport command
Improved bulk create for tags / files / sessions
Raise an exception on import if a tag has no tagcreator
Support for camelCase API fields
Use "uri" for URL_FIELD_NAME in API
Added nested entity roles to TagSerializer
Enabled filtering on TagSerializer
Implemented API endpoint for adding SWID tags
Improved validation in API endpoints
More & better tests for API endpoints
Removed ajax from trusted flag
Replaced button with text if no swid tags are available
Fixed another case of "too many SQL variables" error

When a tag already exists, the files of the old tag are re-assigned.
This causes another query that won't work on SQLite. Using
`chunked_bulk_create` fixes this.
Cleaned up old tests

- Removed broken selenium tests
- Removed simIMV.py
Made directory name readonly
Made product name readonly
Made package name readonly
Applied new readonly look to files
Names aren't changable in the backend now