everyvoice demo creates folders in an active directory

[wiitt]

Running everyvoice demo creates logs_and_checkpoints and preprocessed/YourDataSet folders if they don't exist in a directory which had been active when the everyvoice demo command was activated.
Running speech synthesis in demo interface creates a synthesis_output folder with a wav folder and latest_predict_data.pth file in it.
Although demo doesn't save anything in the created folders, no folder creation should occur.