Update gems.
Refactor datasets and import operations to allow importing from multiple sources into a dataset.
Begin refactoring import processes. File import working.
Ignore documentation generated by yard.
Refactor most of import rake task into Import::WorkerManager class.
Recreate the dataset's index after deleting it to remove data.
Catch exceptions in start_import and add utility method to output with timestamp.
Have import_worker process manage its own PID file. Add debug option to prevent redirecting output.
Use Gnip account name in configuration instead of full Powertrack stream/rules URLs as those URLs can be derived from the account name.
Rename Gnip stream class and add error handling for disconnects.
Implement worker process for importing data from Gnip.
Move code to keep running until shutdown command is received into base worker.
Remove old Gnip rake task.
Add form utility class.
Redesign UI for create dataset and dataset info views.
Remove import files directory from UI.
Add file for utility extensions to String, etc.
Prevent running an import operation more than once.
Fix variable name.
Move start/stop import out of dataset controller.