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.

[joanise]

It looks like logs_and_checkpoints no longer gets created, which is good, but the synthesis_output folder still gets created when you synthesize stuff, with this contents:

synthesis_output/
├── latest_predict_data.pth
└── wav/

[joanise]

Here's another related bug, though: if you use -o, it's only half honoured:

Command: everyvoice demo -o foo ../fs2.ckpt ../voc.ckpt

File structure after synthesizing a file:

.
├── foo/
│   └── wav/
└── synthesis_output/
    └── latest_predict_data.pth

I think the desired behaviour is:

1. by default, no output is created
2. if -o is used, then maybe it's OK to create some output
3. since no files ever actually get saved into wav/, it should not be created
4. if it's relevant to create latest_predict_data.pth, it needs to be in the directory specified by -o, but I don't understand why that file gets saved, that probably should not happen, at least not by default.