Sync translation files, to finish PR #584
Merge pull request #586 from flibbertigibbet/feature/run-translate-sync

Sync translation files, to finish PR #584
Allow scenarios to be created without a base_scenario
Merge pull request #587 from WorldBank-Transport/feature/scenario-creation-fix

Allow scenarios to be created without a base_scenario
Add SimpleJSON to requirements.txt
Merge pull request #588 from WorldBank-Transport/feature/add-pysimplejson-dep

Add SimpleJSON to requirements.txt